The 1.19 panorama (mangrove swamp) shows a chunk of the previous panorama (1.18 mountain)
Edit - Thanks to comments, I figured out it was my resource pack that was causing the problem! Thanks for the help.
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Comments 4
If you mean resource packs, then it was already clear from the style of the in-game buttons that a resource pack is active (it looks like it's from "Vanilla Tweaks")
This is likely a problem with your resource pack. Does disabling it resolve the issue?