iMac M1 screen flickering during intensive tasks

My 2021 M1 iMac's screen flickers for a few seconds every 20 seconds or so. It usually happens when I'm doing more intensive work such as exporting a video or using Logic Pro. Has anyone else had this issue? I've included a video where you can see the flicker at the beginning for several seconds before stopping: https://youtu.be/O8LcfpjsMNA.

[Re-Titled by Moderator]

Original Title: M1 iMac screen flicker