When saving and reloading a world with structure blocks, the bounding boxes are always displayed, regardless if the setting is set to on or off. Affects both save and load variants of the block
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duplicates 1
Comments 2
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We're already tracking this issue at MCPE-50739, so I will resolve and link this ticket as a duplicate.
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There's also a chance of it occurring when you go far away and come back. I quick fix is simply opening and closing the GUI. I know, shouldn't have to do this but I'd rather not destroy them. Hopefully, they fix it soon.