Tracks are the same bpm and beat matched but then they seem to drift. First time I have seen this was last night after the update? Coincidence?
It didn’t happen with every track but was happening regularly. Any help would be great. Thanks
Picture for attention 
When you say beatmatched do you mean by ear or you’ve just matched them up on screen?
Why is it that so often when people make posts like this, they never specify what the tracks are? 
The fact it doesn’t happen on every track is a clue that it’s not the equipment.
What are the two tracks in question and have you ever mixed these two tracks together before (so you know they should mix)?
Give us the track details and we can test to confirm/deny.
Instant double to check real audio drift.
2.- We assume the tracks are correctly analyzed in Engine Desktop and exported with Sync Manager.
What analysis range are you using in your options?
Were you using the Ableton Link? It’s possible that the delay in the configuration (just below the option to connect Ableton) was out of date.
This is the first thing to do.
This could simply be a problem with aging grease that has become hard over time, slowing the rotation of the motor’s central shaft. The grease may need to be replaced. The update may be just a coincidence.
Two tests to perform:
Do an instant double on the same player (in dual-layer mode) with the latest firmware version and see if there is any drift between the two layers. Do this on each players.
Downgrade to version 4.2.0 and repeat the same test with that version.
If the drift occurs regardless of the firmware version —> you should replace the grease on the player where you notice the drift. If the drift only appears on 4.3.2 and not on 4.2.0, then it’s most likely a bug in the latest version.
Hmm, in the pic the SC6000 on the left is reading 126.0 bpm and the one on the right is reading 123.0 bpm.
Second layer on the right is 126.0.
Photo for attention not of the issue
Both by ear and screen
It happens on many different tracks. I don’t think in this instance that is helpful info
You have to give more information, it doesn’t happen to me, we will do something differently
If this happens to you often… what do they have in common? Can you record a video?
@Angus_Wurth Apologies. Thought that was a real-time example.
You might not think so, but you came here for help and we’re asking for good reason.
It could be that one or more of the problem tracks has an unsteady tempo, but if you refuse to tell us at least two of the tracks that you’ve tried to mix, we can’t possibly know, and we can’t try the same mix ourselves to replicate the issue and test.
With both motors off, try to mix again. You’ll probably end up replacing the grease what @Gaian also stated.
I understand the reason for the question and appreciate your help. I’ll find the tracks and list them when I’m back home. It would be very strange if it was the tracks as these are tracks I’ve played many time before.
Again thanks for your help!
Yep will try and film a video and report back
Why are you ignoring the people who are telling you the obvious first step? Instant doubles of one track on both units will tell you whether it’s a grease/spindle issue. If it’s not, you move to the next phase of testing.
Yes… it’s the simplest and quickest, two identical songs, with the engine on and off, to see if it’s a grease problem or a software problem or something else.
Gave two advices, but don’t see any reaction.
