Bug: Keyboard and MIDI streams conflict

[lemiffe]

Summary:

When you have keyboard keys pressed and then press a midi key, it cancels the keyboard events, and vice-versa.

Doesn't happen when using two MIDI devices, so it must be something to do with the merging of the keyboard and the midi streams.

How to reproduce:

• When I have a midi device and a keyboard
• I press keys on one device (and leave them down)
• I press keys on the other device
• The stream no longer contains the ones from the first device

Examples:

• Two MIDI devices: https://cl.ly/23010y2w0y2N <- Works fine
• 1 MIDI device + keyboard: https://cl.ly/0Z1x0P1s2p3Q <- Issue