Hello,
does this happen for every scene?
what version of C4D are you using?
Please, after you get a freeze, try to press LeftShift, RightShift, Delete simultaneously to force quit C4D and get a log file. That log will be located in %appdata%\Maxon\Maxon Cinema 4D R21_64C2B3BD(this changes based on the C4D version)\_bugreports
Please, attach it here.
Thank you,
Jan