I found reason with chatgpt help. Arduino did change settings without any warning. LovyanGFX uses PSRAM for as frame buffer. In Tools menu the PSRAM:xxx was set to disabled.
Now when thinking, Arduino probably updated boards to 3.2.1. While doing that it also messed /cleared) some settings for the projects. This should never happen !!!!
I see this as bug in Arduino.
Finally, it was sort of corruption and Arduino did it itself... case closed.