Took my forks apart over the weekend. (Fox float fit rlc). Most i.e. 95% of the oil on the spring side had migrated to above the air spring. There should only be 5ml in there. Easy to drain out from the top though. Nothing complicated on the spring side just release the air first).
I think its a known issue and you can get replacement seals for them. I now have full travel- it topped out at least 30mm before