I just realized that OG Cam doesn’t allow you to manually flash firmware which I guess that’s the reason why they don’t let you download the previous firmwares like the V1, V2, V3 & V3 Pro.
I wonder could it be iOS app related issue ? You might as well try downgrading the app by installing 2.50.0(14) beta via TestFlight. That beta app was uploaded on March 18 2024. Please note there are probably other bugs introduced with this beta app so it is up to you. Since then there were 2 more app updates, 2.50.0.17 and 2.50.1.1 which had bug fixes as noted in the release notes.