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Fairphone only support Fairphone OS, /e/OS is supported by the e foundation, Fairphone OS updates are Fairphone OS updates and don’t automatically translate 100% to /e/OS updates.
So the question would be whether the e foundation knows of this problem.
If the issue doesn’t already exist at Issues · e / Backlog · GitLab, then somebody should open an issue there to get /e/OS developers to take a look.