PUBG Support recommends to set up FPS cap framerate
PUBG Corporation recommended that the FPS limit be set in PlayerUnknown's Battlegrounds settings for those players who experience problems with client performance.
Players experiencing FPS freezing with 100% CPU usage, we recommend setting your In-Game FPS CAP to 190 FPS or lower in the Gameplay Settings.— PUBG Support (@PUBG_Support) September 14, 2020
This may mitigate freezing/hitches for some players. depending on your hardware.
Let us know if this helps mitigate the issue for you.
A few weeks ago the developers started to solve the performance problems that some users encountered after the 8.2 update has been released.