My guess is that Pd is not launching with the proper MIDI backend. I would launch Pd like this (-alsamidi is the relevant flag):
pd -rt -jack -alsamidi -inchannels 1-outchannels 2 -open /home/odroid/Documents/Pd/externals/chair/examples/A01.karplus-strong-pd
If you have QjackCtl running on the Odroid, you could also leave autoconnection of Jack audio and ALSA MIDI to QjackCtl.
Is there any particular reason why you run Jack with 44100 and not with 48000 Hz? On some systems 48kHz perfoms better than 44.1.
Please be super careful to avoid unplugging the Tickle while zita-a2j is accessing it. zita-a2j unfortunately eats up all the memory until your system becomes unstable.