Hi,
Did you found soulution for this problem.
Looks like I have same issue with my rut950.
Every time I put some "heavier" load on internet mobile connection reconnects.
When I connect remotely to check my cameras around the house, it restart connection.
When I log into webUI via RMS and checking the mobile connection logs it also restart connection.
It worked fine for 2 years now...
Rebooting the unit solves the issue for a while....maybe few hours, then it happens again
Thanks