Did you also test using an ethernet connection to eliminate an issue with the WiFi?
no... but i did try flashing it back to 384.3. I had some other tests i wanted to try, unfortunately it was a complete waste of time BECAUSE for some reason the flash nearly bricked my router. For one, the IP changed after the flash to 192.168.1.1 (default), then when i ping the old IP(192.168.1.160), i get something like this back:
C:\Users\hunte>ping 192.168.1.160
Pinging 192.168.1.160 with 32 bytes of data:
Reply from 10.30.10.6: Destination host unreachable. (this IP belongs to my VPN i disabled prior)
Reply from 10.30.10.6: Destination host unreachable.
Reply from 10.30.10.6: Destination host unreachable.
Reply from 10.30.10.6: Destination host unreachable.
Ping statistics for 192.168.1.160:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
then a while later:
C:\Users\hunte>ping 192.168.1.160
Pinging 192.168.1.160 with 32 bytes of data:
Request timed out.
Reply from 192.168.1.123: Destination host unreachable. (IP belongs to my own PC that i am pinging FROM)
Reply from 192.168.1.123: Destination host unreachable.
Request timed out.
Ping statistics for 192.168.1.160:
Packets: Sent = 4, Received = 2, Lost = 2 (50% loss),
BUT... it would often ping from the wrong IP (192.168.1.1). And respond with a UI with this IP.
every time I try to connect the bridge to the wifi (from the main router), it fails to connect. it lists the connection strength and transfer rate, but has an X showing disconnected. I reset to factory using the UI, and needed to setup in router mode just to get past the stupid new connection wizard that put me into a setup loop. setting up in bridge mode from router mode did not change the IP, and did not connect. It remained as 192.168.1.1. I then tried to flash over it with 380.69_2 from within the admin UI, but that seems to have failed. Same issue with IP. I put the router into recovery mode, reset the NVRAM, then flashed to 380.69_2. Everything was immediately back to normal after it reboot (it correctly took the static IP from the main router DHCP), and i removed the static IP from my PC which i applied during recovery. I'm never going back, not even to test. PLEASE get rid of that terrible UI. the new UI does NOT allow a manual override. There is no way to set it up manually. The IU for 380 is much better. I spent about an hour fighting with it. I don't know why it went crazy, it just did. I successfully flashed to 384.3 at least twice previously, then back multiple times.
So on with the real testing:
I connected with my wifi card instead of though the bridge (AC68U), connected with a RT-AC3200 and no issues whatsoever (firmware 384.3). This means the problem is either with the bridge mode, or some other unknown issue, or the AC68U itself.
Sigh...