Tremolo isn't ringing anymore, but growling

Message from https://musescore.com/user/28092
Acc: https://musescore.com/user/28092/scores/954466 Musescore 3 offline play has timing- problems, but score still plays well with online-player

Hello,
Some weird, spooky sounds with offline-playing of my Boogie-Score under Musescore 3. Got a Message from user blue1x3
"instructions unclear, piano broke"
Thanx for the info, blue1x3. I edited this Boogie with Musescore 2.02 in 2015. And, as the Online-Player on Musescore.com PROOVES still now, it sounded and played quite well at that time. Now, its Musescore 3 as actual software. So, a week ago, I downloaded the new software to my son's Medion Akoya laptop under WIN 10. And, as a demo for my son, I downloaded this file, https://musescore.com/user/28092/scores/954466, too.
All I can saY: Me too... seems you're right, blue1x3, the 32nd notes don't ring anymore, they only growl now. Reminds me of Ver. 1.3 that showed similar problems.
As a supposition I would say, this could be some chaotic result of my soundmix. In this soundmix, there are two pianos playing. a Yamaha Grand and a honky-tonk- Piano at the same time for more Chorus and Reverb. The 2nd Piano is noted in "hidden staff", so you don't see it online, but it played well under ver. 2.02, online and offline.
Looks like a case for the development-team. I will send them a notice.
Thanks again, FarrierPete

Well now: Enterprise, some problem ready for beaming. Beam it up, Scotty!
FarrierPete