Struggling with direct connection from mobile device

Ok, I’m pretty sure this isn’t a Plex issue, but my device. But struggling to get to the bottom of it, so thought I’d reach out here in case anyone can suggest anything, or perhaps able to suggest any diagnostics I could try running.

Plex on my Nexus 6p can no longer establish a direct connection to Plex, even when on the same network. Other devices are working fine on the same SSID. I can make an indirect connection fine, and Plex Server itself says remote access is fine (and is, for other devices)
Android Version 7.1.2
Plex App Version 5.7.2.302
Plex Server Version 1.4.4.3495

However - the issue actually goes further than Plex, I can’t connect to _any _part of my internal network from my phone - eg my file server can’t be reached either. I have nothing fancy setup on my router; just some port forwarding.
Seems to have coincided with the latest update to android 7.1.2

Again, I know this isn’t likely a Plex issue, but if anyone has any pointers, or has had a similar issue, would love to hear about it!

I’ve got a 6P, been running the 7.1.2 betas for a while - haven’t run into this problem myself. Have you ruled out a rogue app that might be causing the issue with your phone?

Try to update your server and maybe it will fix your issue.