I upgraded RouterOS and the LTE firmware in the same period. Now, my LTE connection constantly drops down and then never comes back unless I do something to the LTE settings (like flipping 3G or Roaming and applying). This occurs one or 2 times a day I would say.
I suspect this is the firmware (version EG12EAPAR01A11M4G).
Is there a way to downgrade just for a test?