This is not a bug - the Scale Remap pipe keeps track of the case when multiple keys are mapped to the same output note, so that if you accidentally play, say, two adjacent keys, mapped to the same note, the Scale Remap pipe drops one of them, so your sloppy playing is not audible. 
To workaround this behavior of Scale Remap, I’d recommend placing a Transform pipe before Scale Remap to transform the Note On into a Note Off, inserting it after the original Note On.