You just need to wait until the newer software version of the hosted web app is bundled with a new release of Plex Server.
Or simply load the web app from app.plex.tv
It shouldn’t make a difference at all. In fact it is recommended to use the ‘hosted’ web app at all times, except maybe when debugging things.
Ok, I read a bit about the hosted web app and if I’m accessing it on my local network it stays within my network so I have no reason to use my IP.
I’ll switch to using the plex.tv url from now on.