Waveform: MIDI CC 64 imports as tempo change

[Jon_Eiche]

I'm using Tracktion Waveform 11 Free. I created a piano track in my notation software and exported it as a MIDI file. Waveform imports that perfectly IF there are no sustain pedal (CC 64) events, but with the sustain pedal, the track imports with all kinds of extreme tempo changes. I've looked at the MIDI file in a text editor, and it seems to specify CC 64 just as expected, with a value of 127 or 0 depending if the pedal is on or off.

Does anyone know why this is happening and how to correct it?