When you give an invisibility effect to any armor stand with /effect
command while holding an item, the item is having issues, sometimes the item follows the player, sometimes it is transferring to another armor stand. The item is not connecting to the armor stand as far I see. I just wanted to make a floating item effect with armor stand for my map, but this bug is happening.
Also, I'm testing on the classic world, no experimental features, no Education Edition features, etc.
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I’ve been experiencing the same issue. Though,sometimes when I log off and back on the item is gone, along with the stand (gone,not invisible) while another time I logged off and the stand was replaced with a large, ominous shadow that appeared in the sky and could only be viewed from certain angles(however I have not been able to recreate this event). Aswell, many times I attempt to take the item out of the stand’s hand it crashes the game entirely.