About once per every 3 hours of gameplay when I portal back to town and the splash art screen comes up, the game just hangs there forever. Prior to season for this happened maybe once a month, but now it is happening much more often. I play on the xbox series X with console connected via ethernet to an ATT fiber internet that has 1GB+ bandwidth.
Sounds like the issue I and a couple of others have experienced.
I have a similar issue. If I wait long enough, I usually end up where I started, but with no minions, and I cannot summon more minions until I get out of the zone by entering a dungeon or portaling (which will usually work on the second try). When the first portal fails, I am a valid target for mobs for 15 to 20 seconds before the splash screen clears.