Kelp will start at age 25 and not grow at all. Has nothing to do with the change noted in MCPE-57330 or ticking speed. Bone meal does not make it grow at a height of 1 block so the plant is spawned in at age 25 and will not grow, rendering my automatic kelp farm totally useless. Again different issue than MCPE-57330.
Linked issues
Comments 2
This issue is discussed in the comments to MCPE-57330, but it also has its own ticket at MCPE-60156.
This may actually be an issue with the game changing the source block that the kelp is in to a non-source block when the kelp is broken by a piston. I've noticed that when I manually break all the kelp to "reset" the farm, some of the water blocks will become air temporarily before reverting back to being a source block. Sometimes it takes multiple times of planting and breaking the kelp to have it not do this. Whatever the issue is, it is 100% breaking my automatic kelp farm that I spent hours building. And over a week without the bug even having been looked at is frustrating as well.