Dimension Filter/Mining Dimension Issue

Hi - Using DH 1.21 on ATM9 Modpack

All worked fine until I went to the Mining dimension (from AlltheModium)

Upon doing so, distant horizons showed overworld chunks far below (as mining dimension is high up near build limit) in un-explored chunks.

When returning to the overworld, Mining dimension chunks were rendered by distant horizons instead of overworld chunks.

Any advice? Is there a setting or something I am missing or should change?

Thanks
Solution
try tuning multiverse required similairity in dh's settings
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