Hey, thanks for responding, yes I can confirm no settings at all were changed in retroarch/the emulators. The startup bios screens still play and show but only behind the bigbox spinning disc startup screen.
For example... on ps1 when you go to load a game it will spin up the disc for like 4-6 seconds then you can hear the iconic ps1 startup sound in the background and only then will the big box spinning disc disappear and you only catch the last bit of the ps1 startup screen/bios.
Before it obviously span up the disc and after the 4-5 seconds it would disappear THEN load up the ps1 startup screen, it is sometimes dependant on the loading as it will occasionaly load some games ok without a quick startup but then do the same for another platform, we have used it a lot so know this is not normal and something has become broken somewhere, so annoying as I love the startup/bios screens, thanks.