Hi, I have a similar problem and it has cost me hours of hard work, because I do not always notice that the text (formula) that I selected is no longer selected (it changes highlighting from blue to gray). I have inadvertently deleted dropdowns, galleries, containers, you name it, when only trying to delete or cut text from the formula bar.
I had in fact started cutting text instead of copying, because it happened all too often, that when I eventually found the place where I wanted to paste the formula, something older gets pasted... in worst case, even a duplicate of a control, or of a screen. By my reasoning, if I cut and immediately paste (Ctrl-X, Ctrl-V), I lose nothing and can be sure the clipboard has what I want before I move on.
I suspect many other bugs in the interface, but don't know where to report them reliably.
I am using Firefox almost entirely. I have disabled the upcoming feature named Co-Pilot.
(Copilot has not given me a single table, screen or form that I could use. Since I've stopped hoping, I still try a question once every two weeks, just to confirm it isn't for me.)
As you may notice from the screenshot I include, I am not using an English version of the environment. I have tried, but it helps me partly only, as my employer is German, as is our "system".