Planning with both Tesla and Ionity is longer and takes more time than planning with only Tesla SuCs

🚧 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/planning-with-both-tesla-and-ionity-is-longer-and-takes-more-time-than-planning-with-only-tesla-sucs/
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How is it possible that the planning with both Tesla and Ionity as preferred chargers results in more kms and longer trip than when only Tesla charger is allowed?