Thank you very much for checking this and for your patience — and sorry for the confusion.
I’ve confirmed the behavior, and this is actually intentional by design.
Fantamidi is based on 32 steps as the reference. When you set it to 64 steps, the starting half depends on the DAW timeline position.
For example, if playback starts at step 17, it begins from the first half, but if it starts at step 18, it begins from the second half.
This is partly my personal preference: when I want to slightly change the development in the middle of a track, I prefer the MIDI to start immediately from that point rather than waiting for the loop to come around.
The same idea applies to 128 steps — I thought it could be useful to control the starting position from the DAW side.
To be completely honest, there are also technical limitations on my side, and handling this in a more flexible way is currently difficult.
Ideally, it would be great to switch this behavior with a checkbox, but I’m sorry that I can’t offer that yet.
That said, I truly appreciate your feedback — it’s very valuable.
I’ll record this as a feature request for a future update.Thank you again for your detailed report and for supporting Fantamidi!