Yes, that’s the one, and it is a folio case. The question about the magnetometer showed up on my feed just after this, and so I checked the SafeSleeve, since it has a magnetic latch as well. The compass was way off, like 180°! It
stayed off when I removed it from the case (plastic shell is attached to leather case), but when I restarted the phone, out of the case, it corrected itself. 5 minutes after I put it back in the case it was off again. The maps work ok, but the phone doesn’t
know which way it’s facing. (Interesting, the interaction between GPS and the magnetometer in those apps.) I don’t know whether it’s the magnetic latch or the radiation shielding that’s doing it, I’ll communicate with the company.
Later: My wife has a folio case with a magnetic latch, but her compass works perfectly. So it most likely is the shielding. (Proves it’s effective 
. Haven’t heard back from the company, but wouldn’t expect to yet. Will post their response if it’s interesting.