When a shulker enters through a end gateway, when you go back to the main island there is only the minecart, the shulker just disappear
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So I have to wait for them to solve that other error? Just in case I try again and this is still happening with shulkers
Yes.

This must be re-opened, since shulkers still disappear in 1.14.3.

Loek van Vucht yes but i dont know how to do it :/

My message was meant to the moderators. You cannot re-open your issue. This issue must be set as "unresolved" by a mod or as a duplicate of MC-155616
New ticket: MC-155616
Probably caused by MC-147715