I’ve already spoken of this very annoying bug here, and years ago I sent the info to Elektron, without any success. So, here is the bug :
when the MD is slaved to the OT, if you want the MD to follow the pattern changes of the OT WITHOUT waiting for the end of the current pattern, th only solution is to send a midi note at the beginning of each pattern (ont the OT) and to use note midi mapping on the MD. OK, but when you do this, each first step sound of the pattern playing on the MD is doubled (“BBoum” instead of “Boum”)
The only way to get rid of this problem is not to use de tempo sync on the 2 machines. This way, the sound is not doubled anymore. But of course, you cannot change the tempo anymore on the OT, because if you do so, the MD won’t follow.
So, after having paid very expensives machines, and after years of waiting for this problem to be solved, I think it would be great if Elektron decided to do something !