I also bring my own little testimony in case it might be useful. PellesC v12 behaves exactly as Philippe reported, on my Windows 11 24H2.
I do not use poide.exe for development and I compile my programs using batch commands (.cmd files). pocc.exe, porc.exe and polink.exe work as expected. No errors are generated during the compilation process (with the exception of those due to programming errors). The latest version of my little tool has been developed entirely in Windows 11 23H2, and then in Windows 11 24H2. So far I have not received any 'weird' reports from users who have downloaded and used it. As far as I know, it is being used on a wide range of operating systems, from Windows 7 onwards, including the Server versions. So I would say that the executables created with PellesC v12 on Windows 24H2 also work as expected.
Based on my experience, I also think that the problem is due to poide.exe instead of the individual tools (pocc.exe, etc.).
Marco