Hello,
Do the described issues apply to a single device or are there more units?
Regarding the first one, have you tried to check if you can access the router via SSH?
Do you have remote access via SSH/HTTP(S) enabled?
Are you not able to restore from backup after resetting the device to factory defaults or after firmware upgrade?
Did you upgrade with the Keep setting on?
Could you replicate the second issue and attach a troubleshoot file to your question. To generate the file, access router's WebUI, go to System -> Administration > Troubleshoot section and download troubleshoot file from there.
Files are private and visible only to Teltonika Moderators
Best regards,