diff --git a/.changeset/lovely-queens-own.md b/.changeset/lovely-queens-own.md
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+---
+'mermaid': patch
+---
+
+fix(block): overflowing blocks no longer affect later lines
+
+This may change the layout of block diagrams that have overflowing lines
+(i.e. block diagrams that use up more columns that the `columns` specifier).