Warnings about missing Instruments when playing the GS Version of Grabbag

[Vamp898]

I used the MIDI Files from here

https://leejacksonaudio.lbjackson.com/html/download.html

When trying to play the GS Version, Fluidsynth tells me the following

fluidsynth: warning: Instrument not found on channel 1 [bank=9 prog=30], substituted [bank=0 prog=30]
fluidsynth: warning: Instrument not found on channel 2 [bank=24 prog=30], substituted [bank=0 prog=30]
fluidsynth: warning: Instrument not found on channel 3 [bank=3 prog=81], substituted [bank=0 prog=81]
fluidsynth: warning: Instrument not found on channel 4 [bank=3 prog=81], substituted [bank=0 prog=81]
fluidsynth: warning: Instrument not found on channel 7 [bank=2 prog=81], substituted [bank=0 prog=81]
fluidsynth: warning: Instrument not found on channel 8 [bank=6 prog=81], substituted [bank=0 prog=81]
fluidsynth: warning: Instrument not found on channel 12 [bank=1 prog=62], substituted [bank=0 prog=62]
fluidsynth: warning: Instrument not found on channel 11 [bank=1 prog=87], substituted [bank=0 prog=87]

The result doesn't sound broken, so the substitution seems to work and i am unsure how relevant these warnings are.

I tried setting the MIDI Bank Select, but that did not change anything

> get synth.midi-bank-select
gs

Unsure if this is even related to the Soundfont but wanted to ask