Yep, because they are people using an flatpack version under Linux that fails to work.
And, there are versions that run under windows that are not made by the CB team.
So, have you went and selected each CB toolchain and autodetected it?
If not as I have already stated that speed it up in the past; but, when I did it gave clues to which CB toolchain was causing problems.
But, you seem to have no clues on which one is causing problems.
Also, CB used to always look for an MINGW GCC and it might be much slower if one was not installed.
Do you have an MinGW GCC installed and CB configured to find it?
Tim S.