No sign of that here. What's the timing on that? A few minutes
offline once in awhile or disconnects every few minutes?
You didn't say which.

If it's a few minutes offline once every few hours it could be your
system running out of RAM and timing out on connections. I do see
that once in awhile after running constantly for a few weeks.

Some routers also choke up because they run out of buffer space.
That can cause failures very quickly on a busy day, such as a short
disconnection every few minutes followed by a router crash and
reset. If you have one that can be flashed with a replacement OS
you can then fiddle with timeouts to prevent that.