It happened maybe a month or so ago. I updated it atleast once since. I think it was 2 updates ago as i update again and thought it would have fixed it bit no.
CPU - 2.2 GHz 6-Core Intel Core i7
GPU - Intel UHD Graphics 630 1536 MB
RAM - 16 GB 2400 MHz DDR4
OS - Mac OS Catalina 10.15.7
It was working up till a month or two ago. I have rerset preferences, cleared the media cache, cleared all device cache, redownloaded the app and still the same. It stops playing back and then when I go to quit it stops responding all together and I have to force quit.