This problem occurs in both nether and end. This has happened to me twice.The first time this problem happened in the nether I was 80000 blocks away from my home and the second time it happened in the end portal. Then I fell into the void.
This problem happens to me occasionally. But accessing the game using VPN solves the problem for a few days.
This problem has been happening for a long time. Some earlier versions of Minecraft also had this problem. So today I reported.
My android device model: Samsung Galaxy j4 plus.
I restarted the game and went back to that place. But the fish were still stuck there.
For this problem, I can see treasure chests and mine cart with chests.