Sodaq sara aff r410m

I am having some technical issues and according to the U-blox forum thread that I posted there they think the problem could be on the SODAQ card. Thread here:

When I try to put the at command +UBANDMASK=1,524288 the modem just stops responding. on the CAT-M1 it works fine on the same band but not on NB. I am also expeciencing other technical errors like the +CEREG=1 command isnt persistant and goes back to 0 in like 10-20s I am powering the device via the USB-cable.

What is wrong and how can I fix it?

Best regards,

Have you already found a fix?