Hi,
Considering the number of rules i'm assuming you are using Powercli scripts or API calls? Adding to that when you say this happens after 30 minutes,does that mean when we push the rules,30 minutes from the start time of the activity it eventually times out? Does that network let you change/update any other settings? Easiest way to isolate will be to deploy a edge explicitly from vShield manager and push the same rules,that will certainly isolate the issue.
Note:As far as i know the maximum firewall rule that edge supports is 2000 so that shouldn't be a problem in this case.
