Banner swing error

I have a surviv save, the creation is used when the 1.9.4 version, currently running in 1.12.1, the banner in the main world and the lower bound will not swing But when I create another archive, the banner will swing, even in the lower boundHope that this feature can be repaired as soon as possible, the banner does not swing looks too rigid, or want to inform the banner in some world does not swing the reason

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