When soloing particular track, another tracks with playing long notes receive note-offs messages and long notes break off (when unsoloing or using solo in front).
Need add option to disable note-offs messages when solo is activation.
Current bug behavior in Reaper:
https://drive.google.com/file/d/1Qd0...YXvfRCJZ1/view
Normal behaviour (other DAW):
https://drive.google.com/file/d/1GTQ...KKOdzxc2c/view