Playback on website and in software has this weird slowing down effect that wasn't added in (and trumpets disappear)

Hi everyone hope all is well! In my score below, the playback always seems to cut out the trumpets and slow the piece down, as if there was a ritardando (but there isn't one). How could I fix this?
Thank you
https://musescore.com/user/32980011/scores/10824670/s/CG8guz?share=copy…

It happens around measure 10-17.