One of the issues here is the time it can take this problem to manifest itself. I've had the problem disappear up to 10 days or so before reoccurring, which makes troubleshooting it very frustrating.
I hate those kinds of problems. You are never sure when or if you have the cause identified. 👹
"All you've got to do is own up to your ignorance honestly, and you'll find people who are eager to fill your head with information" --Walt Disney