Cannot Jump out of water

When in water, unable to jump out of water onto a block either auto jumping (holding down space) or just pressing space once. does not seem to be affected by any seaweed in the water in that block as far as i am aware, other player reported it seems i was just jumping in place, even though i was moving towards the block to get up onto. Looking in third person, looks like i'm not jumping high enough to get up onto the block.
World is a "old" world, no cheats.

eventually can get up but i do not see anything that triggers it.
(not sure if this is the right "project")