Hacking Emulation ROM Hack dsone eos working fine, now consistently crashing

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i apologise in advance if this has already been discussed or asked, i’m very new to modding my ds lite and this is the first cart and os ive worked with. i’ve played games here and there when i can for a few minutes and they’ve worked fine except for some corrupt saves which i didn’t care about anyway. though tonight with every game i’ve played at some point during a transition during the game the whole system will crash. i say that meaning i couldn’t bring up the dsones own pause menu and would have to turn my ds off and on again. i really don’t know what to look at first because i don’t believe any of the roms are corrupted, and don’t know if it’s a problem with my ds, the flash cart, or i should try a new os for emulation all together and what i should look at to find the issue. thank you for your help in advance and sorry again