Hello,
Thanks for your post.
While this does sound like a question for support and I do want to urge you to reach out to them
here.
I would suggest checking the input selection on this track. Each track in the AmpliTube iOS recorder will show the input selected as "Channel #". Make sure you have the proper input selected for your interface. Tap this "Channel #" to see all available options.
One other thing to check is the 'FX' button in AmpliTube. This will allow your signal to go through the selected Amplifiers and FX. Make sure this is enabled.
If this information does not help. Please reach out to IK support and PM me the ticket # once created.