Can you post your Upstream and Downstream data so we can see if it's a problem with power levels. Type 192.168.100.1 into your browser's URL to access the hub ... do NOT sign in, but click on Router Status to access the data.
Well they all look healthy enough. The Upstream power levels are at the high end of the spec which is 51dBmV but certainly within it. Might be worth keeping an eye on that in case they are intermittently straying beyond which might indicate an issue.