This is a subtle and a very annoying bug.
If you try to edit a the address bar by selecting an item from your history, then usually what I do is to selecting the text by click Command+Shift+Left Arrow and then once enough is selected I start typing the change. this doesn’t work anymore - instead a much longer text is being replaced. the only workaround I have is selecting the same way and then hitting backspace to remove the text and then starting to add new text - this works, but so annoying. can you help?
Also hitting Ctrl+Z to undo doesn’t work either