Short notes are (sometimes) not played

### Bug Summary

When a MIDI device sends **a very brief note** (a *note on* and then a *note off* after few milliseconds), sometimes the instrument plays the sound, and **sometimes it is ignored**. I've discovered this using an MPK mini keyboard, with the pads, which are pressed for a very short time (just a "tap", less than 10 ms). I noticed that **some "taps" where skipped**. I tried the same MIDI keyboard on MPC Beats (windows) and Ableton Live (windows), and there are no missing sounds (the device is not damaged). I've also created a simple Python script to generate brief notes in order to verify the problem:

```python
#!/usr/bin/env python3

import mido
import time

port = mido.open_output(name="TEST", virtual=True)
on = mido.Message("note_on", note=56, velocity=127)
off = mido.Message("note_off", note=56, velocity=0)

while True:
print(".", end="", flush=True)

port.send(on)
time.sleep(5 / 1000)
port.send(off)

time.sleep(1)
```

#### Steps to reproduce

1. Create an empty project, and add an instrument track (ie. "BitInvader". Enable the *envelope* and rise the *release* time to get a less annoying note).
2. Run the previous script (or use a MIDI device that can produce very short notes)
3. Connect the intrument track MIDI input to the TEST device

#### Expected behavior

Hear a note every second (or at the pace you press the key in the MIDI device).

#### Actual behavior

Some notes are skipped (not played at all). It does not occur on every note, just one beat each three or four.

#### Screenshot


#### Affected LMMS versions

* Version 1.3.0-alpha.1.158+gbf323d202 (Linux/x86_64, Qt 5.12.8, GCC 9.3.0). (tested on **Ubuntu 20.04** and **Ubuntu 21.10**)
* Version 1.2.2 (Linux/x86_64, Qt 5.9.7, GCC 5.4.0 20160609) (tested on **Ubuntu 20.04** and **Windows 10**)

Start by running the supplied Python reproducer and connecting its TEST MIDI output to an instrument track as described. Trace the MIDI input and note handling to determine why some brief note-on/note-off pairs are skipped. Done means the instrument reliably plays each short note across the listed environments and reproduction steps.

Written by the indexing model from the issue text.