I hoping #BikeTooter crowd can help:

I'm frustrated with my road tubeless situation to the point I'm about to go back to tubes. I've only had one flat in 1+ years of tubeless, but for a 2nd time (w/ diff tires this time) I am having issues where the tire appears to seal, but slowly goes flat after 24 hrs sitting in the garage. The problem is not caused by any known event or circumstance. It is not correlated to weather changes.