Odd behavior of harpischord and base clarinet Muse Sounds

First off, I love MuseScore and appreciate all the work people have put into it. My problem is that sometimes when I attempt to use certain instrument Muse Sounds to replace older MS Basic files in some pieces originally created in MuseScore 3, really odd things happen. In one piece, the Muse Sound for the Clarinet kept introducing these distinct clicks. Most odd was when I switched one piece from MS Basic piano to Muse Sound harpsichord the first note in measure 37 would not play, even though the same phrase occurred earlier in the piece without problem. Even if I cleared out the measure before, the same thing happened. What I finally discovered is that adding an empty measure at the beginning of the score shifted the missing note forward by about a measure. My question is, is there a best-practice for, I guess, "sterilizing" an old MuseScore 3 score to prevent some of these things from happening? Thank you!!