I have recently moved from MacOS to Pop! OS (an Ubuntu-based distro).
Keyboard is set up as US-INTL with Dead Keys. In all programs, the combo "acute+C" prints CEDILLA (Ç, ç), except for RStudio, which returns ACCUTE-C character (Ć, ć).
Even RStudio's Terminal returns ACCUTE-C instead of CEDILLA, while any terminal application installed in the OS gets it right.
I supposed this is GUI related.
This is driving me crazy as it really hurts when collaborating on RMD notebooks.