BTW, I'm using the same system and media that I always use, the only thing that has changed is the update to premiere. I edit on an iMac with proxies. Never have had this audio pop and scratching before.
16 GB Ram
Premiere 22.3.1 version
Canon 4k mp4 files, editing with 1024 x 540 proxies
If that doesn't work, try resetting the Workspaces: Reset a workspace Reset the current workspace to return to its original, saved layout of panels. 1. Do one of the following: • Click the Workspace menu icon and select Reset to Saved Layout. • Choose Window > Workspace > Reset to Saved Layout. from here: https://helpx.adobe.com/premiere-pro/using/workspaces.html
If that doesn't work, try Preferences > Audio Hardware and set Input to None.
If that doesn't work, try creating a new project and import the old one into it.