Actually, try switching to 2.4Ghz band instead of 5Ghz.
5Ghz may be faster, but 2.4Ghz will give you a more stable connection over a longer distance. There is also such a thing as being "too close", especially if your router is not far from a corner wall, causing all sorts of strange reflections.
Wired is your best bet (I wired all my media devices). I hate WiFi for streaming. WiFi is fine for browsing, but streaming is a different story. Especially "if" you are relying on some ISP provided router which are rarely anything to write home about. I use 3 Cisco enterprise grade access points for my WiFi (5 bars in the whole house and even in the front or back yards) and still try to avoid it if I can.
Your device is actually disconnecting and then reconnecting. The fact that you don't see an interruption in the video is because of the internal buffering. If I disconnect my cable from my box, I can often go for about 7 to 10 seconds before it actually stops.
And hell 10ft away, I am sure you can find some sort of creative way to get the damn thing wired. Move the router, run it along the baseboards, and hell there are super thin wires nowadays also. I used one of these at my mom's place. Super thin, cheap and got it in white so it blended into the wall color. Ran it right on top of the baseboard and to avoid using clips, I ended up just using a tiny dab of hot glue at the edge where the wall meets the baseboard (every foot), and then laid the cable into it. You can barely tell it is there.
Code:
https://www.primecables.ca/p-381828-cab-pc-08029-slim-cat6a-28awg-utp-ethernet-network-cable-cmrft4-white-primecables-goslim#sku398614