Hi GPC,
Thanks for the heads up. Please submit a bug report page linked below. Also, you will need to be more specific in what you mean by "popping." I am assuming you are talking about occulsion? A video would be ideal since what you are describing seems very specific.
https://community.7daystodie.com/bug-test-1/
Edit: I found your original post and noticed you mentioned some console errors. When visiting the bug report forum link above, please make sure to read all of the items required for the report listed in the red banner so the issue can be further investigated. (e.g. outputlog file, etc.) Thanks.