I'm getting about an hour flatline on trends which started with the time change this morning. I have checked times on all servers to make sure they updated and match. Any suggestions? Thanks

I think that’s normal.

From
https://www.vtscada.com/help/Content/Op_UsingVTS/OP_VTScadaAndTime.htm?TocPath=Use%20VTScada%7C_____1

Attempting to view a full day's data (24 hours) on a trend at midnight after the shift to Daylight Savings time (a 23-hour day) can result in an hour-long flat line at the end of the trend.

I had some issues this morning as well, on multi are homed systems , one of the servers didn't adjust and was showing an hour behind from Windows time, witch then I beleive messed up the polling driver and cause a bunch of stuff not to update.