Tested it, and it appears that Podium calculates the MIDI notes received from the plugin to be a little earlier than on the beat. That causes the first notes to be dropped, because the notes are interpreted as having been played before the recording starts. I don’t know if it is Podium that calculates the note position incorrectly. I’ll verify that at some other time.
For now, you can record the repeated loop, and then crop the sequence to the start of the second cycle.