MusicXML import not working properly on MuseScore 4

Here 2 identical .musicxml files with the same simple drum part: only 4 notes on snare drum.
The only difference between theese files is that one of them has additional instrument in element.

Expected: after import to MuseScore 4 both files play snare drum notes
Actual: only one file play snare sound, another one play low piano notes

This problem actual only for MuseScore 4+ version. (Version 3 or other software play both files as expected)