Hot iPhone 13 lost a lot of battery power within 3.5 hrs.

Hello,

Weird/Odd. Hot iPhone 13's iOS v17.6 (updated from iOS v17.5.1
yesterday) battery power percentage dived from recharged 88% to 23% from
6 PM to 9:30 PM while out to eat dinner in a crowded restaurant and
commute to there and back home. Battery statistics said it was hot to
recharge at 88% max. Usage shows "Find My" and weak cellular using half
in the background for the first hour, but after that was just "Find My".
Battery health shows 89% which is normal for this iPhone from 2/1/2022.
What's going on? Is this a new bug or something? :/

Thank you for reading and hopefully answering soon. :)
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"For this world in its present form is passing away." --1 Corinthians 7:31
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