By the way, is there any possibility (program?) to determine if the ram or something else is corrupted for a defined ESP?
Something lile the checkdisk of windows...
I looked at Expressif's ESPFlashDownloadTool_v3.6.2 and I didn't see anything there, no separate button for verifying. It is normal to automatically verify after programming. I didn't try loading with that tool so I don't know if any additional options are present after programming.
So the current module is definitively broken but once again i did not understand why the module works at higher supply voltage...