Thanks for checking and verifying those things.
I’m thinking of similar issues that have been reported recently. But nothing is quite a match.
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This one during beta testing turned out to be a keyboard layout issue – Anki 25.06 Beta - #160 by sprvlcn .
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This one seems to be a Qt issue – Command-v for paste into macOS file picker doesn't work –
25.07.x doesn’t have the Qt version bump that’s cooking in 25.08 beta – but let’s wait to get confirmation from the other user before thinking of that as a possible solution.
Can you check that layout and your OS and see what the shortcut is for the ç character? If it’s Cmd + Opt + c, then your OS might be grabbing the shortcut first/also.