Jane Hi Jane!
I was looking at your midi data, and I found some more pedal data after the notes:
134 Position:3.3.97;Channel:1;Type:CC;Parameter:Hold Pedal (on/off) (64);Value:119
135 Position:3.4.17;Channel:1;Type:CC;Parameter:Hold Pedal (on/off) (64);Value:117
136 Position:3.4.19;Channel:1;Type:CC;Parameter:Hold Pedal (on/off) (64);Value:113
137 Position:3.4.21;Channel:1;Type:CC;Parameter:Hold Pedal (on/off) (64);Value:102
138 Position:3.4.24;Channel:1;Type:CC;Parameter:Hold Pedal (on/off) (64);Value:84
139 Position:3.4.26;Channel:1;Type:CC;Parameter:Hold Pedal (on/off) (64);Value:71
140 Position:3.4.28;Channel:1;Type:CC;Parameter:Hold Pedal (on/off) (64);Value:45
141 Position:3.4.31;Channel:1;Type:CC;Parameter:Hold Pedal (on/off) (64);Value:66
142 Position:3.4.36;Channel:1;Type:CC;Parameter:Hold Pedal (on/off) (64);Value:9
143 Position:3.4.38;Channel:1;Type:CC;Parameter:Hold Pedal (on/off) (64);Value:0
144 Position:4.1.00;Channel:1;Type🙁end) All Notes Off;Value:0
These were the midi events afterward. Could it be that the sustain pedal was sending different data that overwhelmed the sample player? I think this is a great issue for the support team to take a look at.
However, I do have to say that word has it that the pianos before the N1X has some midi inconsistencies. I've certainly experienced bad time on my NU1 in China. Could it pedaling is another one of those? I don't know.
Sorry, more questions than answers, but never the less some thoughts there.