HTTP integration has a big delay


I have been running into trouble about the HTTP integration on TTN recently. I have been using the integration for months and it keeps working well until this week. Yesterday I was seeing a 1 min gap, and today I saw a gap for more than 10 min. I also set another HTTP integration pointing to a completely different address to make sure it is not the problem of the other end.

Not sure what is going on. Hope somebody understands this.