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It's been absolutely fine since last bleed 6 months or so ago.
Work colleague rode bike round car park yesterday playing with dropper as not tried one before.
Dropped it down to get it in the car for transit to last night's ride - as soon as I get on it the post sags by in inch or so and it's like that throughout the ride until later on it dropped all the way unexpectedly. Pull the seat up and it's sucked back down.
Why has it suddenly done this? Anyway had similar? Guessing there will be lots of 'yes' here.
Hoping another bleed sort it. They're great bits of kit until something like this happens!
Is the air pressure correct?
Sounds like the dreaded-IFP issue. I think you need to take the post apart and reset the oil level. Possibly changing some seals as well. There's a very good video/manual on how to do it on the SRAM website somewhere. I've had that problem a few times and my mate always fixes it for me. He seems to find it easy, I'd never get past the bit where you need the circlip pliers...