The video of the bug present is attached but it won't play in my browser, probably because it is h265 encoded. To watch the video download 03.mp4.
I can confirm. Though the issue is also present for us on PC and Laptop as well since 1.15.
I've noticed similar issues on four different devices which each have different storage. Two Android and two PC devices. One has UFS 2.1 storage, the other has emmc, the laptop has tcl ssd, my pc has traditional rotating hdd drive. So it's not just the storage and chunk loading which causes the performance issues... but the game changes overall.
I see! So that means if I let the kelp block grow 3 blocks high and I put one row of active water above the observer it should work? like: https://ibb.co/m6gkLr3 This?
But the water CAN reform. There are active water blocks under it and above it. As soon as the piston draws back a new water block froms. Furthermore farms based like this work online. Why won't they work for me?
I can confirm too that this is very relevant in 1.18 official release. I used to put a great deal of effort into making world generation data packs for me and my friends for different playstyles such as: ocean only world, desert only world, winter apocalypse etc. Customizing structures was a core part of it and now you cannot edit which structures will start in different biomes... This is highly frustrating.