Why midi extracted by Cubase 13 from an Audio track kills any Prime Bass output

I extracted a midi track using variaudio in Cubase 13 and copied it on a Prime Bass new track using Kontakt 7.
But when I play it there is no sound sent on its output channel.
Inspecting the midi generated by Cubase I discovered that there is a RPN section on the beginning which creates a problem :
CC 101 0
CC 100 0
CC 6 6
CC 38 0

its appears that this 'system' sequence set the pitch bend amplitude for synths (value 6, from my input from Cubase popup before generating midi in my case).
Apparently it kills Prime Bass !!
When I removed it the output come back to normal.

I read the prime bass documentation and find nothing about this midi sequence.
Shoudn't Prime Bass be protected against it ?