We now have a resolution on this. It turned out that when she was done working, she would just close the lid on her laptop without disconnecting the session first. I told her to try disconnecting first using the "X" the next time she connected. She did so last night and was not prompted again after disconnecting. I verified that the logs did not show the repeated attempts to reconnect.
Thank you for your suggestions!
I will go through the Support Team if nothing here points me to a resolution.