A further update for anyone who is reading this thread. I have been running the same situation at home now with the AR750S connected to my home WiFi. I have not had any duplication of the issue that I had at the Hilton in several days of continuous operation. The problem appears to be related to the Hilton connection. I hope that you can figure out what they might be doing.

This was my first travel in over a year due to the pandemic.