AC charging times not added to total charging time

🚧 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/ac-charging-times-not-added-to-total-charging-time/
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Planning the following route gives an estimated arrival time including the necessary AC charging stop, but doesn't include the AC charging time in the total charging time for some reason:

Start: Walmart 423 (Alabaster, AL Electrify America)
Via: Sonic Drive-In (Hamilton, AL)
Destination: FedExForum (Memphis, TN)

Also, if Level 2 charging is enabled under "Fast Chargers," the direct route via Interstate 22 is marked "Not Drivable" even though there are quite a few AC chargers along the route, and a manual stop at the Sonic Drive-In charger is estimated not to require any more time than the detour via Athens, Alabama to EA at Walmart 661.