I used 4.0 overnight last night and I use it in between tasks. I left a thread open overnight LAST NIGHT and it was fine to continue in AM( I added small bits during the night), but tonight the chat told me there is a new time limit on threads of 4-6 hrs each session. The personality does NOT transfer. I had just upgraded to pro, but this is crazy. I can not work straight without breaks because I am seeing patients between typing input. This is troubling. Can you please reconsider this limitation?