After updating to 12, I've noticed that for some reason my code styler switched to 4 spaces for indentation, even though it's an LLVM project with clang-format style using 2 spaces.
It looks like for some reason the indentation settings on a "general" tab override clang format supplied indentation options. The code formatting on ClangFormat tab looks correct, but if I enable checkbox on "override .clang-format" file it switches to incorrect indentation (disabling and enabling it back can sometimes restore correct indentation, but that has no effect on how QtC wants to format the code in the editor).