Paste in Front / Back should be disabled while actively editing text
Ctrl+B and Ctrl+F are still available to paste objects while user is actively editing text. This should not be allowed.
Ctrl+V does some kind of text only paste in the active text edit field (this makes sense) but hitting Ctrl+B or Ctrl+F (by default, paste in back/front) these will ACTUALLY paste artwork whatever it may be in the location copied from, WHILE the user is in the text edit field. This could mean unexpected behavior and user may not realize they pasted something as it may not even have drawn on screen.
Editing text should be single threaded, and focused on editing text, or you're just going to limit the keyboard shortcut possibilities or confuse users.

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Allan commented
No, not intentionally, I had forgotten some of the in edit text keyboard shortcuts, and I believe I only found this on accident, but hitting Ctrl B, if it isn't to bold text, or do something else intentional, should not allow you to accidentally edit other parts of the document. I am only concerned about it (not really but I think its an easy area for improvement) because you can imagine a user intending to _Bold_ text or do something with _Font_ and ending up pasting artwork elsewhere in the document (which they may not even see happen because it could be many units away (because those paste in place). Its not necessarily what your screen is looking at when the paste behind occurs. There's no indication inside the active edited text if the paste is not a ctrl v operation.
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Text mode offers some text-specific hotkeys, and these do replace hotkeys used outside of editing text... and this is basically the only mode in Ai that does it (and the UI doesn’t really specify this well enough in Keyboard Shortcuts today).
This is why the recently added Bold / Italics hotkeys aren’t just Ctrl+B / I, but use Shift also (Ctrl+Shift+B / I) — to keep the Paste in Back / Front available.
I presume you try to make something bold and press Ctrl+B — is my guess correct?