I needed that battery power…
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Go to Settings > Battery > Battery Health & Charging and turn off Optimized Battery Charging.
If optimized charging was the culprit, it should show a pause symbol on the graph. The issue is likely related to heat or a bug, but I would recommend leaving optimized charging enabled for long term battery health.
You can turn off clean charging and just limit charging to 80%. At least on 17.4.
Also I wonder if clean energy charging is causing this.