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Having an issue that I've not come across in previous threads here or elsewhere.
Basically the post sticks down a bit for the fist inch or two of its travel, but works fine once gently pulled to begin movement.
Air pressure and bleed status fine. Had a service not too long ago. Not clamped too tight (it's actually off the bike).
Try another few bleeds.
I've only ever seen that with the clamp over-tightened, but you've ruled that one out pretty conclusively.
Is the return speed slow after the initial "help"?
If it's quick, then it's not likely to be a bleed issue.
I'd go straight to warranty, assuming it's still covered. (2 years)
turn the slow/fast adjuster to faster?
burp it 5 or 6 times Stace 😉
If it popping up fast after you nudge it to get it moving if so I would guess it doesn't need a bleed but maybe you have dirt/moisture/grit in it's mechanical contact bits-ie the delicate lower bushing(gets effed up easy and coating pulls off),keys and sliding channels.Remedy is a quick strip/clean and re-grease with maybe a basic service kit being needed if that lower bushing is toast.