I am having the same issue for targeting armor stands. This seemed to start when adding a larger quantity... as I've been using named armor stands in chunks that unload before. It was only when adding about 30+ in a single chunk that I began to notice entity cannot be found errors. Sometimes this clears up by having the chunk reload (I can leave/join and it's targetable again). This is very frustrating – is there any known workarounds?
I am having the same issue for targeting armor stands. This seemed to start when adding a larger quantity... as I've been using named armor stands in chunks that unload before. It was only when adding about 30+ in a single chunk that I began to notice entity cannot be found errors. Sometimes this clears up by having the chunk reload (I can leave/join and it's targetable again). This is very frustrating – is there any known workarounds?
edit: Created a video demonstrating how to reproduce the bug: https://youtu.be/qJUnypdC6qA