Vimantas1,
When I don't use Force LTE, the connection drops after a time. I did not time it yet, but it is less than a few hours.
currently I have 2 routers on the same FW version, as a test, I stopped to deploy it to the rest of our systems.
product code: RUT955H7VXXX / Modem : EC25 FW version: EC25EFAR02A08M4G
Batch: 0025
Hardware revision: 0011