I’ve noticed the same problem with PSIO (240p) booting into PAL games (288p). Seems to be another design issue in the TVP7002 digitizer chip, I’m not sure if it can be fixed without negative side-effects (e.g. to 240<->480i switching). Perhaps TVP7002 sync processing reset could be included in mode switch code when “Full TX setup” is enabled, i.e. when compatibility is prioritized over switching delay.