cacti reporting less connections since upgrade

I upgraded a pair of clustered 1600s running 9.4.7 to 10.1 two weeks ago. Nothing else has changed.

 

 

Until then Cacti had been consistently reporting a daily rise and fall in connections from around 1800 at night to 2700 at daytime peak.

 

 

Since the upgrade cacti reports that daily change as being from 100 to 900 connections. The F5 dashboard history shows the same amount of connections as Cacti is currently recording, so at least the current readings are consistent and I think accurate.

 

 

The difference between night and day is the same, but Cacti was counting 1700 more connections at all times before the upgrade.

 

 

Anyone observed this and have an explanation? Is 10.1 much better at killing off redundant connections, perhaps?