Setup Advice to Bypass Issue

I have an AiMesh network setup with an RT-AC3100 and an RP-AC1900 with my primary computer hardwired into the RP-AC1900. Recently I had a wall and doors installed to create an office. This seems to be causing connection issues between the two devices resulting in my computer losing internet. I did find switching to a media bridge helped, but the connection was not stellar.

The biggest thing is I use the computer for gaming, so I'm looking for advice on the cheapest, but sufficient solution...

Setup Advice to Bypass Issue