Using HiFi latest build for P3Dv4. Simserver with Remote CDU and an ACARS program. Did not have this animation error until I just updated the latest GSX update.
There's an option, which is DISABLED by default, to LIMIT GSX so IT will not put too much strain on Simconnect, in order to be more respectful of other addons, especially if you have very high frame rate, it's called "Cap Simconnect updates" and it's disabled by default.
When the option is
disabled (which is the default), the frequency of udpates is NOT limited, so GSX will work
exactly as it were before, not limiting itself.
When the option is
enabled, GSX will not call Simconnect more than 30 times per second, regardless how high your frame rate is. This MIGHT cause your issue, because GSX would intentionally limit itself in order not to cause issue TO other addons, when your frame rate is much higher than 30.
So, if the option is disabled, it's not possible the latest update could have anything to do with this, because when it's disabled, nothing has changed in relationship with the frequency the connection to the sim.