Having used Rokus for close to 10 years, I have a whole house full of them. It is pretty familiar to me that the Roku Ultra (duplicate of a 3 with a gaming remote), 2 Roku Express + 3910RWs, a streaming stick 4k for vacations, and two TCL Roku TVs (65" and 43") work. One 3910RW is glitchy out of all of them.
After reading all the posts and documentation, here's what possibly is the issue: is it really, truly an issue to be too close to the wi-fi access point? I can't hard wire it (no ethernet on the 3910RW), and can't move it further away (limitations of the room), so right now it's an issue with connectivity.
There are two access points (one in the living room and one in the garage) and a repeater throughout the house on my wi-fi network. It consists of a main cable modem 1 Gb wi-fi router from Xfinity (Comcast) and two access points. The first access point is in the living room, literally inches beneath the 65" TCL Roku TV, which I hardwired to the access point because it's the main viewing TV and I don't want any issues. The second access point is in the garage, roughly 10 feet from a 3910RW and the 3930X, both connected via wi-fi and operate perfectly. The 43" TCL is in my bedroom and connects to the living room access point, with no issues.
Roku Ultra is in the kids' playroom and is connected to a repeater via Wi-Fi. No issues here either. The last 3910RW is in the home office, about 8 feet away from the main Xfinity (Comcast) 1gb cable modem wi-fi router. THIS is the one with the issues... it constantly loses it's connection with the wi-fi, but I can't physically move the devices any further away from each other, and with no ethernet, I can't hardwire it to my network. Almost every time I use it (about once every few days) I have to reconnect it to the network it already claims to be connected to... It makes a network connection, but no internet connection. I restart it through the option offered, and it usually works... but not always the first time. I have tried to connect it to the repeater and/or one of the other access points, and it won't make a connection at all.
Physical proximity is the issue, or is it something else? Or is this particular Roku glitchy and has a radio issue with the wi-fi? The other identical model Roku in the garage is only about 2 feet further away and never has an issue. Should I swap it with one the garage Rokus and see if the issue continues? The other reason I think this particular 3910RW has a problem is that on ALL of my Rokus, I upgraded remotes from IR to RF voice remotes, and they all work fine except this office one - it connects to the IR remote just fine, but the RF remote doesn't seem to ever work right, and if it does connect to the R3910RW (sometimes it won't work at all), not all the features work on it. I have tried re-pairing the RF voice remote dozens of times unsuccessfully, and yet it still kind of works, but not always.
My reading of all documentation and posts has not yielded the same issue. Looking forward to some closure on this.
