There’s a setting to set the dimmer to switch mode (for physical control only) that can be enabled with a switch tap sequence. I haven’t pushed a driver update yet, so you’ve managed to enable it. Or it could be the manual steps/timing settings taking hold if you have them set to 99 and 1 as in your screen shot.
I’ve got this figured out. What’s happening is that the default commands that are sent for on/off include a “duration” parameter set to 1 second, and that overrides any of the settings on the device. I have one switch (my motion dimmer) that has the same dimming steps/timing settings as yours, and I now have it obeying the device settings, including flipping on/off immediately. I just need to do a bit more testing before I can push out the update to the driver.