I was having a similar problem with my 2017 L2501. It started happening after I did my 200 hr service. Apparently I accidentally bumped/loosened the valve to bleed air out of the fuel system. Once tightened everything has been fine.
Hey first post here, but I have had the pats qh for a few years now. I bent the L bracket down a bit so it would not slip off off of the spring loaded locking arm. Hope that makes sense.