(configs/releng) * To -> CD / DVD / BD * To -> USB-key / SD / HDD / SSD * PC-BIOS (MBR) * PC-BIOS (ISOHYBRID-MBR) * PC-EFI (GPT) [x86_64 only] * Alternative boot methods (configs/releng) * ISO in loopback mode * ISO in memdisk mode * Network booting (PXE) [...
Since you say the same Ventoy USB drive works on a different Dell, it sounds like a problem with the 3558? Did you try a 'reset to defaults'. Try any other boot manager/loader like Easy2Boot? If both Legacy and UEFI booting to Ventoy show the same issue, maybe it has a RAM or ...