I have written to you in private, since you seem to prefer Italian language (please, try to avoid it on the forum).
By the way, more or less the same answer which I gave you in private can be found in this thread:
In short, load all the needed plugins in advance, keeping them active at all times, and activate/deactivate the associated routings to select which one should receive notes. In this way, notes are not cut when you switch plugins.