once you set to bridge mode, your main router will assign a dynamic IP to this router. i also initially thought i had lost connectivity but noticed it appeared in my host dhcp

I also had this problem. But it stabilised after a while. What I noticed was for 5GHz, even tho my router was right next to the computer, wireless only got 17-200Mbps up/down even though it sat on a free channel. When I changed the band to 80Mhz, it will randomly select a channel (eventho its a congested channel and outside 80Mhz from my desired channel) BUT I will get 1201Mbps up/down. I left this configuration on and its working great. I attribute this to a buggy OS? But after first configuration, it does drop connections a bit before stabilizing. I really want to see if I can flash OpenWRT or something else on this or not.