Issue with canvas recording

I'm trying to figure out if this is an artstudio pro issue or an issue with my own file and setup.

The first time I began canvas recording, the autosaves began taking progressively longer until the app eventually froze and I had to force quit and reopen it. When I did, my progress after the last autosave was lost.

I tried again and the same thing started happening, each autosave took longer than the one before it. I got worried about losing my progress again and tried to manually save it, which is when the app froze on me while it was saving.

I checked the app in Activity Monitor and it showed that it was "not responding" so I left it for a day, hoping it'll recover on its own but it didn't and I had to force quit again and reopen it. I managed to export the video this time but it came out jumbled and out of chronological order.

The size of the canvas is 2500 × 3000px