Connectivity drops. T3 and T4 timeouts in modem logs

Hi,

my connectivity used to be very good, but in the last 3 to 4 weeks it regularly (several times a day) drops. Most times it comes back in a minute or two. When it takes longer and I just end up rebooting the modem.

About a week or two a go a technician came here and replaced an old splitter outside my home and confirmed all the signals were good.

I still have regular drops, twice in 1.5 hours this morning. 

This creates a lot of problems as I'm often in work video conferences and the kids are in remote/online school.

In the modem logs, it shows T3 and T4 timeouts.

In the status page, the power and SNRs seem to all be good. Here are the contents of the status and log pages:

- Status: https://drive.google.com/file/d/1_-ucRMJg9jNGPlESP-TDmu42FosVnHA1/view?usp=sharing 

- Logs: https://drive.google.com/file/d/1YKxc14VsmMa0mRvPNp-S7sHQfjQHjxqg/view?usp=sharing 

I would call support, but I hope I may find a more knowleadgeable support person here...

A few more details:

- modem: Arris SB6183

- speed: 200Mbps (I always get a little more in the speed tests)

- computer connected directly to router, then to modem

- as soon as the problem happens, traceroute (to 1.1.1.1) only shows my router (192.168.1.1) all else times out...

Thanks for any help!