Intermittent Internet Drop Outs

I have been having intermittent drop outs of my internet.  It seems random and will be fine for a couple days and then may go out 3 or 4 times the next day.  It will go out for anywhere between 10-45 minutes.  Over the last week it has gone out 10 times with only 3 of the 7 days free of drop outs.  I have tried two different modems (Netgear CM1000 and CM3000).  It has been going on for at least a couple months now.  But I was out of the house and unable to troubleshoot for a while.  I knew it was going out though as my smartthings hub would notify me when it lost connection.

I have been reading up and learning what I can about cable modems and how it works, but admit that much of it is over my head.  However, based on what I have been reading, I think the issue may be that the Upstream power levels are spiking and causing the modem to freeze up.  When it goes out, I am unable to access the modem web interface unless I reset the modem.  When it is working properly, the upstream power levels are already high at around 47 - 51 (should be between 38-48).  I am usually not home when it goes out and even when I am, I am not looking at the modem status page to see what the power levels are right as it goes out.  This morning I was home when it went out and tried to grab the info from the modem status page a bunch of times after I reset the modem and it was trying to reconnect.  It would lock onto one upstream channel and then drop it repeatedly.  But when it was locked on, the power level was at 59.

The modem is on an xfinity supplied 3-way splitter (3.5 dB).  Unfortunately due to the layout and wiring of my house, I need the splitter.  However, I have resigned to only using two of the ports.  On a day when it was doing well the levels were at 46.8, 46.3, 46.3, 46.0 & 46.3 (downstream mainly between 2.2 - 3, but with a couple at 4.2 & 4.6).  I tried removing the splitter to test and it dropped the levels that day to 44.5, 44.8, 44.5, 44.3, 44.5.  (It put most of my my downstream levels to around 4.5 - 5.)

I was able to grab one status reading about a month ago where it was bad and it was locked onto 5 upstream channels.  Their power levels were 58.5, 58.5, 58.0, 57.3 & 52.5 at the time (downstream between -3 to -1.5).  15 minutes later, the power levels were 51.8, 51.8, 51.0, 50.8 & 51.5 (downstream still between -3 to -1.5).  (I can't remember for sure, but I believe the modem was on a 7 dB splitter port at the time.)

The line that feeds the splitter was replaced and rerun through the house a couple months ago.  We were having signal loss on our xfinity 4k dvr and some channels would intermittently have issues with going out or being pixelated.  The xfinity tech came out and replaced all the fittings and everything he could and said that he was still seeing signal loss for the frequency for those channels.  He said the cable in the wall needed to be replaced.  We had their recommended contractor (HelloTech) come out and run a new line within the house from the master closet where the cable enters the house and splits out.  When the contractor pulled the old line out, he said it was run with a bunch of short lines connected by female-to-female connectors.  He ran one continuous line to replace it.

I can't be certain, but I feel like our internet connectivity issues started after we got the line replaced.  Is it possible that the connectors could have been damping the power levels down to acceptable levels and after getting a new line the power spikes are too high for the modem?  I have also read that power spikes can be caused by a damaged wire outside the home, maybe with frayed wires.  Also, in case it can affect things, I am in Florida and it is the hot part of the year.  What can I do to try to fix these issues? @Xfinity Support is there anything that can be done?

Here is the error log from my CM1000 modem from this morning when I had an outage.  I admit I don't understand it.  Hopefully someone here can help me make sense of it.  I appreciate any insight you can provide.  (I replaced my MAC addresses with question marks.)