I HAD SAME ISSUE AND FIXED IT
Don’t worry, I’ve been encountering same problem with my application and managed to fix it.
The solution is to check auto layout constraints, collection view delegate, and collection view cell, as well as array of items. Additionally I will test your app for memory leaks and CPU issues than fix them right away.
It will take me maximum 2 days, I’ll keep you updated with how it goes by including screenshots.
I know you are probably getting a bunch of lowball bids... but does it really worth to take unexperienced person just because of low bid?
Regards,
Bezhan