The direct answer
A shared canonical can imply that distinct location pages are copies of the homepage. That may undermine the intended location-page structure.
A practical check
Inspect the canonical on several branch pages and compare their unique content. Determine whether the behavior is an intentional consolidation or a template error.
Choosing the next step
Give genuinely distinct pages appropriate preferred URLs. Do not force separate canonicals for near-identical pages without first considering whether the pages should be consolidated.
Further reading
Platform guidance can change. Consult the current official documentation before making platform-specific changes.
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