Change:
]); }); }); <ins> test('Do not reuse cache from previous session (#132516)', async function () { const provider = new MockInlineCompletionsProvider(); await withAsyncTestCodeEditorAndInlineCompletionsModel('', { fakeClock: true, provider, inlineSuggest: { enabled: true } }, async ({ editor, editorViewModel, model, context }) => { model.setActive(true); context.keyboardType('hellon'); context.cursorLeft(); provider.setReturnValue({ text: 'helloworld', range: new Range(1, 1, 1, 6) }, 1000); await timeout(2000); assert.deepStrictEqual(provider.getAndClearCallHistory(), [ { position: '(1,6)', text: 'hellon', triggerKind: 0, } ]); provider.setReturnValue({ text: 'helloworld', range: new Range(2, 1, 2, 6) }, 1000); context.cursorDown(); context.keyboardType('hello'); await timeout(100); context.cursorLeft(); // Cause the ghost text to update context.cursorRight(); await timeout(2000); assert.deepStrictEqual(provider.getAndClearCallHistory(), [ { position: '(2,6)', text: 'hellonhello', triggerKind: 0, } ]); assert.deepStrictEqual(context.getAndClearViewStates(), [ '', 'hello[world]n', 'hellon', 'hellonhello[world]', ]); }); }); </ins> }); async function withAsyncTestCodeEditorAndInlineCompletionsModel<T>(

Discussion:
<!-- Do Not Delete This! bugreporttemplate --<!-- Please read our Rules of Conduct: --<!-- Read our guide about submitting issues: --<!-- Search existing issues to avoid creating duplicates. --<!-- Test using the latest Insiders build to see if your issue has already been fixed: --<!-- Instead of creating your report here, use 'Report Issue' from the 'Help' menu in VS Code to pre-fill useful information. --<!-- Launch with to check. --Does this issue occur when all extensions are disabled?: No (Needs InlineSuggestions from some extension) <!-- If you answered No above, use 'Help: Start Extension Bisect' from Command Palette to try to identify the cause. --<!-- Issues caused by an extension need to be reported directly to the extension publisher. The 'Help Report Issue' dialog can assist with this. --- VS Code Version: 1.60.0 OS Version: MacOS Catalina 10.15.7 Steps to Reproduce: GitHub Copilot. The exact version shouldn't be important, but this was verified using 1.4.2586. a blank Python document and enter the following text: There are a single space after each sign. Put the cursor on the end of the first line and trigger Copilot inline-suggestion by pressing Backspace then Space. Don't accept it, but press Down-arrow, Backspace, Space. After pressing Down-arrow the suggestion on the first line disappears (as it should), but after the Backspace+space, you may see the suggestion briefly appear again, before the new inline-suggestion appearing on the second line. This is a bit flaky, and it may not appear every time the cursor is moved. It may also depend on latency to the Copilot server, and so be less pronounced in e.g. North America than in Europe or Asia. Edit by This is the buggy behavior: !
Please let me know soon if we should release this with our Recovery Release tomorrow!
Thanks for your lightning fast fix, Releasing this quickly would be awesome - it's a quite distracting glitch!
can you verify that the issue is fixed in todays insider build?
As he's out today, I've had a play with today's insiders build and can't reproduce it, whereas I can with the insiders build from 6th September. So looks good to me!