TMK with Teensy 3.2 - Keys get inverted while typing

[danielepo]

Hello!
I'm having an issue with one IBM Model M 122 keyboard that I converted to use USB.

I rebuild the controller using a Teensy 3.2 and it works almost great, but I'm facing an issue where, if you type fast enough, some keys will get swapped but I don't know where to look.

This is the configuration that I use for the keyboard:

https://github.com/danielepo/ibm.122.Teensy3.2

I suspect is something related to the Teensy 3.2 because I have converted another keyboard (same model) using a Teensy++ 2.0 and so far I haven't had this problem with it.