There must be something in the air. I've just started playing this again after a request when busking.
To get your swing groove going, try it up tempo no backing, then reign it back for the backing track. I can't play anything slow till I can play it fast. It makes it feel like there's loads of time and space when you come back slow again.
A tip I got off an old pro when I was starting out was to phrase paired quavers as triplets with the first two tied. More of a jazz dooo da Dooo da than a classical da da da da. It even makes the sequencer swing a little. Oh and....
Blow the thing lol.