Every action lagging in Fresco (not just filling - moving image, drawing a tiny line...)

This is super frustrating.

I'm working on a vector illustration, and where the fill action has always had some lag, now every. single. action. has a lag. It's infuriating!!! Ijust want to finish this drawing so I can move onto Procreate or some other software if Fresco is just going to be a HUGE PAIN.

It doesn't matter what I do - draw a small line, erase, try to move the drawing view around, zoom in/out. It doesn't respond straight away to ANYTHING. When I try to fill, it shows 'loading' for any amount of time before crashing the app completely.

I'm using iPad Pro 2020, brand new and have barely used the iPad for much else, has heaps of free memory. I've tried force closing the Fresco app, resetting iPad etc.

I'm scared to delete and reinstall the Fresco app in case it deletes my drawing altogether as I've spent heaps of time and it's been difficult to do.

Please can someone help with this?

I've seen other threads where people have the lag issue with colour fill, but not with every action.