I’ve dug further into the lipstick CPU drain bug with AI. We actually found the problem. And… it turns out the bug is long, long known, but never fixed. Ugh. 
New bug report: FadeAnimator in NotificationActionRow.qml causes lipstick to drain CPU (WITH FIX!) And I also (re)created the Patch Manager patch, for use with SFOS 5.2.0.18.