Spurious “This plan is no longer viable” alert, and nonexistent Supercharger

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/spurious-this-plan-is-no-longer-viable-alert-and-nonexistent-supercharger/
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A plan was working fine but at a charging stop suddenly a “This plan is no longer viable - VIEW ALTERNATIVES” box came up. View Alts brought up an empty Best Option list, but it did have a ✅ button, which produced a plan including a charging stop where there is no charger. The original plan WAS still a good one, so we reset and replanned to restore it.