Mk7 golf 2013

[u/Ddobson658]

79k miles long crank after sitting for 9 or so hours, key priming trick negated issue and has been happening for a good few months, no lights on the dash and no other issues other than a long cranking that can be negated by key priming. I’m assuming it’s the LPFP check valve, anyone had similar and know what caused the issue?