I often use an iPhone to log into the Pi-Hole web interface - it's really convenient! Running a previous version 5 of Pi-Hole, this all worked fine. When I updated to version 6 some time ago (don't know the exact version I'm afraid), it broke the iPhone's ability to use the web interface; it would hang after hitting the 'login' button. I finally traced the problem to version 6's use of https. I disabled this and found that the http interface was ok - so that is what I have been using up until now. I suspect the problem with https is that iOS is extremely fussy about SSL keys and certificates to the point where it (iOS) is broken - but that's another story
Last week, I updated Pi-Hole again to version to Core: v6.4.2, GTL: v6.6.2, Web interface: V6.5 and the problem came back. I am still using http (not https) but the symptom is exactly the same. From my iPhone, I can bring up the Pi-Hole web interface, put in my password, hit the blue 'login' button. The 'login' button turns white and then it hangs - no further update to the page.
I have no issues at all with a Linux client running Firefox or a Mac client running Safari
Has anyone else experienced this issue?