You sent me a PM about this and I requested the smallest possible gig file which reproduces your issue using only GP instrument plugins. It would help if you could provide one and even post it here or in your other topic (mentioned by @edm11).
In your other topic, you are using the MIDI In Omni block which is never a good choice for a production gig file. Are you sure there is no MIDI activity in the Plugin Persist 2.0 Scriptlet? Did you use a GP MIDI monitor there? Are you sure there is never a missing Note Off because of a bypassed or missing MIDI In block?