W52H time display setting reverts to 24 hour

[steve.ot]

I have not configured auto provision; it should not do anything by default?
I keep forgetting to do a check in the afternoon, but I do know at least 3/7 (all connected to the same base) have reverted.

I will go and set them for 12 hour, and check again this afternoon.

Update 1:
At least two of the phones did not reset yesterday, after I make sure to set everything in auto provision to off / un-checked. Will check again today.

Update 2:
Sadly, the time was reset this afternoon again on at least one of them.