Hey @farshidtz
We found that it was not auto connecting because my declaration was incomplete. However, after discussion with @pedronis, it seems that we should not be granting auto-connect for custom-device in the global store since these snaps may be installed on devices where the device nodes are not the expected underlying device and so these should be manually connected instead.
I’m now reverting the auto-connection (maintaining the manual connection). Would it still work for you?