RBR860 intermittent disconnects

I have had this Router plus 1 satellite since March 2023. It is connected to Hitron EN2251 modem from Spectrum. The router and modem are plugged directly into the wall plug. Both sit in the open and at least 4 feet from the ceiling. 

Up to June 2025 I have had ZERO problems with the router and then I started getting these random disconnects. The internet was up, not a problem with the service. These disconnects could be a few days apart or hours. I didn't record them unfortunately. 

Chat with Support on July 7th. Elevated to Level 2, after a long chat all he had me do was change the channel on both 2G/5G 11/36 respectively. I sent the Router logs but evidently, he didn't see any there. 

I recorded more disconnects on July 8th, July 17th and July 18th. Stopped recording dates, figured that wasn't the issue. 

End of July, beginning of August I changed the channel on the 5G band from 36 to 48. Seemed to run fine until August 26th (out), out again on September 7th and September 10th. I kept the logs from those 3 incidents. 

Today, September 11th I called Tech Support. The lady kept asking me how many times a day does it disconnect? Really? I don't sit by the router and watch it. I only record when I see the problem. 

End result, she had me perform a complete reboot of modem and router and told me to monitor the problem. I was monitoring the problem and that's why I called again on September 11th. 

Very frustrating call to say the least. 

So, has anyone else had this issue? 

What causes this problem?

How did you fix it?

Any insight will be appreciated. 

Greg