fix #129622

src/vs/workbench/contrib/terminal/browser/terminalEditor.ts

@@ -95,6 +95,7 @@ export class TerminalEditor extends EditorPane {
 			// panel and the editors, this is needed so that the active instance gets set
 			// when focus changes between them.
 			this._register(this._editorInput.terminalInstance.onDidFocus(() => this._setActiveInstance()));
+			this._editorInput.setCopyLaunchConfig(this._editorInput.terminalInstance.shellLaunchConfig);
 		}
 	}
 

src/vs/workbench/contrib/terminal/browser/terminalEditorInput.ts

@@ -12,7 +12,7 @@ import { ITerminalInstance, ITerminalInstanceService } from 'vs/workbench/contri
 import { TerminalEditor } from 'vs/workbench/contrib/terminal/browser/terminalEditor';
 import { getColorClass, getUriClasses } from 'vs/workbench/contrib/terminal/browser/terminalIcon';
 import { IInstantiationService } from 'vs/platform/instantiation/common/instantiation';
-import { TerminalLocation, TerminalSettingId } from 'vs/platform/terminal/common/terminal';
+import { IShellLaunchConfig, TerminalLocation, TerminalSettingId } from 'vs/platform/terminal/common/terminal';
 import { IEditorGroup } from 'vs/workbench/services/editor/common/editorGroupsService';
 import { ILifecycleService } from 'vs/workbench/services/lifecycle/common/lifecycle';
 import { ConfirmOnKill } from 'vs/workbench/contrib/terminal/common/terminal';
@@ -31,7 +31,7 @@ export class TerminalEditorInput extends EditorInput {
 	private _isDetached = false;
 	private _isShuttingDown = false;
 	private _isReverted = false;
-	private _copyInstance?: ITerminalInstance;
+	private _copyLaunchConfig?: IShellLaunchConfig;
 	private _terminalEditorFocusContextKey: IContextKey<boolean>;
 
 	private _group: IEditorGroup | undefined;
@@ -68,18 +68,18 @@ export class TerminalEditorInput extends EditorInput {
 	}
 
 	override copy(): IEditorInput {
-		const instance = this._copyInstance || this._terminalInstanceService.createInstance({}, TerminalLocation.Editor);
+		const instance = this._terminalInstanceService.createInstance(this._copyLaunchConfig || {}, TerminalLocation.Editor);
 		instance.focusWhenReady();
-		this._copyInstance = undefined;
+		this._copyLaunchConfig = undefined;
 		return this._instantiationService.createInstance(TerminalEditorInput, instance.resource, instance);
 	}
 
 	/**
-	 * Sets what instance to use for the next call to IEditorInput.copy, this is used to define what
-	 * terminal instance is used when the editor's split command is run.
+	 * Sets the launch config to use for the next call to IEditorInput.copy, which will be used when
+	 * the editor's split command is run.
 	 */
-	setCopyInstance(instance: ITerminalInstance) {
-		this._copyInstance = instance;
+	setCopyLaunchConfig(launchConfig: IShellLaunchConfig) {
+		this._copyLaunchConfig = launchConfig;
 	}
 
 	/**