The shade should move all the way open/close with a single press.
Keeping one’s digit on the button keeps it moving until you remove said digit.
I’ve never had a problem with it not fully opening or closing. Sometimes the current ones shuts with a ‘thump’ like it slightly over runs.
There is a ‘reset’ setting for the roof but I don’t know how it effects the blind if at all. Bit like with the windows. Once the roof has closed, hold the roof switch in the ‘closed’ position and the roof goes into tilt mode then closes - from what I recall, years since I did it. Might be worth a try.
PS The Yeti blind doesn’t ever stay open, or at least on the three Yetis I’ve had, over night (ie when the ambient air temperature cools) the blind shuts by itself and the same when it rains. My Yetis have all had light/rain sensors, if that makes a difference.