ODB2 Charge left drops too fast

🚧 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/odb2-charge-left-drops-too-fast/
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Samsung SM-A516B/DS Galaxy A51 5G (using 4g only)
Kia E-Soul 2019
ABRP 4.4.1
trip Perpignan to Nîmes airport April 2023. 100% correctly found via ODB2 before starting but soon dropped much faster than shown by car.
Return trip 3 weeks later idem: correct charge found at startup and again after charging 1/2 hour later but dropped much too fast during trip home.
Previous trip September 2022 worked fine 1150 km outward. Lost contact with ODB2 now and again during return but kept the correct charge %.
(I now have a problem with Android Auto not connecting so more difficult to use it)
Cheers,
Chris
Chris@erdal.net