I can confirm that the current version 3.1.1 for OSX does not work either on my system. Focus in or Focus out or going to any presets sends the focuser inward and will not stop unless i unplug the power. This is a tremendous step backwards for this driver as it seemed to work great for me in 2.9.8 and in 3.0.0
I think it has something to do with the Sync setting in the INDI control panel. I just set the sync to 25000 and then manually moved the focuser way out and then hit GoTo Preset 1 which was 50000. It returned to the midpoint as I had 100000 as the max Steps. After that when I went into the EKOS focus module I was able to focus in and out at the assigned step size (which is currently 100).
i want to give a short update: Jasem was so kind to have a look via TeamViewer to my Computer / Sesto Senso. But he could not fix the problem. Then he tried to get in contact with PrimaLuceLab, but got no answer from there until now.
Meanwhile I tested the Setso Senso with ASCOM and I have exact the same Problems! So I think the problem is the Sesto Senso itself, perhaps the firmware.
It is really frustrating that PrimaLuceLab does not answer / tries to solve this problem.