OTAA KO for RAK7200 and LGT-92

Hello,
I have 2 devices, which used to work properly, but since yesterday they are not able to connect again.
Last message seen in the console during OTAA process is Forward join accept to application server (“name”: “ns.up.join.accept.forward” )
Any idea of any change on AS side?
(Keys and device configuration are OK as the already worked)
Thanks

Hi,
Well, after waiting a few days, it is now working again.
I don’t understand…