Keyboard input blocks in VSCode

Question

Since yesterday, I have a problem when want to edit code in VSCode. Apparently, after changing focus within VSCode, say switching to the menu bar or a to different view and then coming back to the editor view, the cursor changed from the caret to a filled rectangle, and normal keyboard input is blocked. I need to do something like pressing the Escape key which on the first, second, or third try finally puts me into overwrite mode from which I have to switch to insert mode. This is a very annoying situation. Does anyone have a remedy for this?

Answer 1

Apparently, I happened somehow to switch to the vim schema. Once I became aware of this, I simply switched back to the VS schema which I'm used to, and everything works as desired.