MIDI routing problem with MIDI FX

[MrDham]

Describe the bug
It looks like MIDI OUT of MIDI FX won't reach MIDI IN of synth until a workarround is applied.

To Reproduce
Steps to reproduce the behavior:

1. Create a synth layer, e.g. "1#ZY >Brass / FM Thrumpet"
2. Bold click on layer "1#ZY >Brass / FM Thrumpet" and "Add MIDI FX" and choose "MIDI Event Filter"
3. Activate "pitch bend blocking" in "MIDI event filter"
4. Play some note and move the PB wheel on channel 1 -> You hear that Pitch is bended whereas it should not be bended.

** strange workarround **
5. Add any new MIDI Fx layer, e.g. "2#JV > MIDI Chord/Sus2"
6. Bold click on "2#JV > MIDI Chord/Sus2" and "MIDI Routing" and unselect all options.
7. Play some note and move the PB wheel on channel 1 -> You hear that Pitch is not bended anymore.

Expected behavior
In step 4, you should hear that Pitch is not bended because pitch bend is filtrated by MIDI Event Filter.

Screenshots
N/A

Setup:

• SD-image
  Raspbian GNU/Linux 10 (buster)
  Build Date: 2020-09-05
  Memory: 15% (143M/926M)
  SD Card: 33% (9.1G/29G)
  Temperature: 56.9ºC

• Hardware Config
  Raspberry Pi 3 Model B Plus Rev 1.3
  Soundcard: HifiBerry DAC+
  Display: PiScreen 3.5 (v2)
  Wiring: MCP23017_EXTRA
  GPIO Expander: MCP23017

• Software Version
  zyncoder: master (517e46a)
  zynthian-ui: master (8ba25fb)
  zynthian-sys: master (4ea75d9)
  zynthian-data: master (20e7da0)
  zynthian-webconf: master (27672ca)

Additional context
N/A

[jofemodo]

It should be solved now. Please, update and test.