Random patches sound when using version 3.0.3 to import a score saved with version 3.0.2

When importing a score saved with 3.0.2 into 3.0.3, patches in the mixer are changed to random patches, but will not show in mixer. In other words, if I load in a score created or saved with 3.0.2, then open the mixer, I will see all the patch names as they should be, but when I press play, the patches will sound like grand piano. Sometimes a flute patch will have the sound of a trombone. A drum patch will have the sound of a grand piano. Again, looking at the mixer, everything seems fine. My workaround is to click on the patch, change it to something else, then click on the correct patch again. The sound will be fixed, and you can save it. This seems to happen only on the initial import of a 3.0.2 score into 3.0.3. All my scores are doing the same thing so I won't upload them. This also might have something to do with #284944: First note is not playing after opening a score if patch change was performed in a mixer. Thanks!