diff --git a/src/imagerenderer.tsx b/src/imagerenderer.tsx
index 3cb4bdc15..ec6063ee3 100644
--- a/src/imagerenderer.tsx
+++ b/src/imagerenderer.tsx
@@ -29,8 +29,30 @@ type CV<V> = mobx.IComputedValue<V>;
 //
 
 @mobxReact.observer
-class SimpleImageRenderer extends React.Component<{data : Blob, context : RendererContext, opts : RendererOpts}, {}> {
+class SimpleImageRenderer extends React.Component<{data : Blob, context : RendererContext, opts : RendererOpts, savedHeight : number}, {}> {
     objUrl : string = null;
+    imageRef : React.RefObject<any> = React.createRef();
+    imageLoaded : OV<boolean> = mobx.observable.box(false, {name: "imageLoaded"});
+
+    componentDidMount() {
+        let img = this.imageRef.current;
+        if (img == null) {
+            return;
+        }
+        if (img.complete) {
+            this.setImageLoaded();
+            return;
+        }
+        img.onload = () => {
+            this.setImageLoaded();
+        };
+    }
+
+    setImageLoaded() {
+        mobx.action(() => {
+            this.imageLoaded.set(true);
+        })();
+    }
 
     componentWillUnmount() {
         if (this.objUrl != null) {
@@ -44,9 +66,13 @@ class SimpleImageRenderer extends React.Component<{data : Blob, context : Render
             this.objUrl = URL.createObjectURL(dataBlob);
         }
         let opts = this.props.opts;
+        let forceHeight : number = null;
+        if (!this.imageLoaded.get() && this.props.savedHeight >= 0) {
+            forceHeight = this.props.savedHeight;
+        }
         return (
-            <div className="simple-image-renderer">
-                <img style={{maxHeight: opts.idealSize.height, maxWidth: opts.idealSize.width}} src={this.objUrl}/>
+            <div className="simple-image-renderer" style={{height: forceHeight}}>
+                <img ref={this.imageRef} style={{maxHeight: opts.idealSize.height, maxWidth: opts.idealSize.width}} src={this.objUrl}/>
             </div>
         );
     }
diff --git a/src/markdownrenderer.tsx b/src/markdownrenderer.tsx
index d5c57461c..58fd9a9d4 100644
--- a/src/markdownrenderer.tsx
+++ b/src/markdownrenderer.tsx
@@ -27,7 +27,7 @@ function CodeRenderer(props : any) : any {
 }
 
 @mobxReact.observer
-class SimpleMarkdownRenderer extends React.Component<{data : Blob, context : RendererContext, opts : RendererOpts}, {}> {
+class SimpleMarkdownRenderer extends React.Component<{data : Blob, context : RendererContext, opts : RendererOpts, savedHeight : number}, {}> {
     markdownText : OV<string> = mobx.observable.box(null, {name: "markdownText"});
 
     componentDidMount() {
@@ -38,9 +38,10 @@ class SimpleMarkdownRenderer extends React.Component<{data : Blob, context : Ren
             })();
         });
     }
+    
     render() {
         if (this.markdownText.get() == null) {
-            return null;
+            return <div className="markdown-renderer" style={{height: this.props.savedHeight}}/>
         }
         let markdownComponents = {
             a: LinkRenderer,
@@ -54,8 +55,10 @@ class SimpleMarkdownRenderer extends React.Component<{data : Blob, context : Ren
         };
         let markdownText = this.markdownText.get();
         return (
-            <div className="markdown-renderer markdown content">
-                <ReactMarkdown children={this.markdownText.get()} remarkPlugins={[remarkGfm]} components={markdownComponents}/>
+            <div className="markdown-renderer">
+                <div className="markdown content">
+                    <ReactMarkdown children={this.markdownText.get()} remarkPlugins={[remarkGfm]} components={markdownComponents}/>
+                </div>
             </div>
         );
     }
diff --git a/src/sh2.less b/src/sh2.less
index 9f292d484..3593d4703 100644
--- a/src/sh2.less
+++ b/src/sh2.less
@@ -2947,6 +2947,9 @@ input[type=checkbox] {
 
 .simple-image-renderer {
     padding: 10px;
+    img {
+        display: block;
+    }
 }
 
 .markdown {
@@ -3003,7 +3006,7 @@ input[type=checkbox] {
     }
 }
 
-.markdown-renderer.markdown {
+.markdown-renderer .markdown {
     padding: 5px;
     line-height: 1.5;
     
diff --git a/src/simplerenderer.tsx b/src/simplerenderer.tsx
index fd65936f3..5f9b3af6d 100644
--- a/src/simplerenderer.tsx
+++ b/src/simplerenderer.tsx
@@ -7,6 +7,7 @@ import {If, For, When, Otherwise, Choose} from "tsx-control-statements/component
 import type {RendererModelInitializeParams, TermOptsType, RendererContext, RendererOpts, SimpleBlobRendererComponent, RendererModelContainerApi, RendererPluginType, PtyDataType, RendererModel, RendererOptsUpdate, LineType} from "./types";
 import {GlobalModel, LineContainerModel, getPtyData, Cmd} from "./model";
 import {PtyDataBuffer} from "./ptydata";
+import {debounce, throttle} from "throttle-debounce";
 
 type OV<V> = mobx.IObservableValue<V>;
 type CV<V> = mobx.IComputedValue<V>;
@@ -20,8 +21,10 @@ class SimpleBlobRendererModel {
     loading : OV<boolean>;
     loadError : OV<string> = mobx.observable.box(null, {name: "renderer-loadError"});
     ptyData : PtyDataType;
+    updateHeight_debounced : (newHeight : number) => void
     
     constructor() {
+        this.updateHeight_debounced = debounce(1000, this.updateHeight.bind(this));
     }
 
     initialize(params : RendererModelInitializeParams) : void {
@@ -52,7 +55,6 @@ class SimpleBlobRendererModel {
         if (this.savedHeight != newHeight) {
             this.savedHeight = newHeight;
             this.api.saveHeight(newHeight);
-            console.log("saveheight", sprintf("[%d]", this.context.lineNum), newHeight);
         }
     }
     
@@ -155,13 +157,15 @@ class SimpleBlobRenderer extends React.Component<{lcm : LineContainerModel, line
     }
 
     handleResize(entries : ResizeObserverEntry[]) : void {
-        console.log("simplerender resize", sprintf("[%d]", this.model.context.lineNum), entries);
+        if (this.model.loading.get()) {
+            return;
+        }
         if (this.props.onHeightChange) {
             this.props.onHeightChange();
         }
         if (!this.model.loading.get() && this.wrapperDivRef.current != null) {
             let height = this.wrapperDivRef.current.offsetHeight;
-            this.model.updateHeight(height);
+            this.model.updateHeight_debounced(height);
         }
     }
 
@@ -204,7 +208,7 @@ class SimpleBlobRenderer extends React.Component<{lcm : LineContainerModel, line
         let dataBlob = new Blob([model.ptyData.data]);
         return (
             <div ref={this.wrapperDivRef}>
-                <Comp data={dataBlob} context={model.context} opts={model.opts}/>
+                <Comp data={dataBlob} context={model.context} opts={model.opts} savedHeight={this.model.savedHeight}/>
             </div>
         );
     }
diff --git a/src/types.ts b/src/types.ts
index 99c3cf2df..3f142649f 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -401,8 +401,8 @@ type RendererModel = {
     receiveData : (pos : number, data : Uint8Array, reason? : string) => void,
 };
 
-type SimpleBlobRendererComponent = React.ComponentType<{data : Blob, context : RendererContext, opts : RendererOpts}>;
-type SimpleJsonRendererComponent = React.ComponentType<{data : any, context : RendererContext, opts : RendererOpts}>;
+type SimpleBlobRendererComponent = React.ComponentType<{data : Blob, context : RendererContext, opts : RendererOpts, savedHeight : number}>;
+type SimpleJsonRendererComponent = React.ComponentType<{data : any, context : RendererContext, opts : RendererOpts, savedHeight : number}>;
 type FullRendererComponent = React.ComponentType<{model : any}>;
 
 type WindowSize = {