Hi
Nice to see a fellow Yamaha user.
Yes indeed. I had this type of problem once with cubase the only program to give me this.
However if you wind the timeline back to the start of the long red note (this is the offending note) and seems stuck on so look at that point for excessive midi activity at that time particularly on that channel but on the others also . This should allow you to see the problem in the events view.

If you don’t need that note delete it, if you do need it insert an end time, before the next occurrence.
You may need a full Daw like Cakewalk for this.
Mike

BIAB2021 UltraPlus,AsusN55S1Tbssd, W10/64,Akai EIEpro
Yamaha CVP405,SquireStrat, CoolsoftVMidSynth
Novatation Impulse61 Ctr kbd, Cwalk blab Kontakt

http://mikesmusic.byethost16.com/