Routing unstable

🚧 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/routing-unstable/
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https://abetterrouteplanner.com/?plan_uuid=31213509-fcac-41ac-afd5-2851de67a472

and

https://abetterrouteplanner.com/?plan_uuid=3a09fd4e-e3a8-46cf-83e3-31dc93de1229

and

https://abetterrouteplanner.com/?plan_uuid=7cc590e4-7105-4ab7-8e2e-d510413bca4a

are different even though the inputs didn't change.

I would expect a route to change with live weather or traffic, but both are turned off. Why do multiple runs with the same stops and settings give different routes/different charging stops?