First midi note not played when starting sequence

Hello everyone,

I hope you can help me.
I have the following problem:

I want to control the Behringer Model 15 analogue synthesizer with the Play via MIDI. On the whole, it works well except for one thing; when starting a sequence, the first note is very often not played. Sometimes it’s working but a lot i does not work.
I have already tried every conceivable setting, unfortunately without success. I have also contacted Behringer support (Musictribe) and after a few tests and a remote diagnosis, the support said that the problem must come from the Play.

So I hope you guys can help me to solve this problem.

Thank you in advance

Best
Chris