sorry for my “dfc” hunch not having paid off. It’s a pity bugreport profiles for battery-historian aren’t that well suited to be public. A link that you post and withdraw after a day might work? you could post the original bugreport file that I saw and a new one for others to chime in.
If you want to get to the bottom of this and I’d be in your position, I’d reset my phone to defaults and establish a /e/OS baseline and check if LineageOS uses another kernel than /e/OS via their Fairphone partnership. @mungo does extensive long term monitoring for the FP3 - Fairphone - FP3 - FP3+ Documentation Suggestions - #59 by mungo - something that’d be great for other phones