Uplink balancing Issues

Hello,

I've got an ASG 220 8.306.

For a while I've had this setup and it worked ok:
WAN: Bonded T1 connection
ETH5: ATT Uverse connection as Cable connection (DHCP)

I've turned off the multipath rules to make sure they weren't causing any issues.

However recently webpages began to stop loaded correctly for both people behind the web filtering and not. I looked in the Web filtering logs and see this:
vpn httpproxy[31660]: id="0003" severity="info" sys="SecureWeb" sub="http" request="0xa4c6b68" function="send_request_headers" file="request.c" line="178" message="write: Network is unreachable"

If I turn off the Uplink balancing or turn off the Uverse connection the problem goes away.

A couple of times reseting the Uverse modem would fix the problem for a few days but recently it has not been helping.
I plug a laptop directly into the Uverse connection and it works perfectly so it doesn't seem to be a problem with the Uverse connection.

It could be a problem with the Uverse line but it seems to be working fine if not connected to the Astaro unit.