Not exactly the same thing, but I have noticed the following on my 950XL DS:
1) Powering the phone off and on always gets better results than a soft reset when I have issues.
2) I often (but not always) have issues crop up over time after I install a build. (I also keep my phone on 24/7)
My advice to someone who asked would be to power-cycle the phone every few days (maybe twice per week). I don't do it because, when I think of it, I am often not plugged in and a power cycle seems to cost me close to 10% off my battery.
Hmm, interesting observation about the power off 10% penalty. It is not that I have or not been affected, I simply may have been blaming the wrong factor. All along, I've been blaiming the camera apps for the extraordinary battery drain with this build.
Since I use my L1020 for photography a lot daily, I been been frustrated by a tendency of this build to cause camera apps to lock-up and other issues. These force me to reboot often. In fact, almost every time I use either 1Shot or ProShot, a reboot will soon be needed. This did not happen before this build.
Your observation suggests that they are separate issues. Meaning that whatever is causing the camera apps to misbehave, is different from the cause for the battery drain.
Could this mean that more folks would see the battery drain effect if something force them to reboot more often?
(Also, perhaps related, the battery indicator has not been reliable in this build...a low-ish indicated level after a recharge, gets refreshed to a higher indicated level upon an immediate reboot.)
BTW, yesterday I did begin to observe that rebooting via power off is perhaps working better than soft reset. I thought it was my imagination until now. I'll try to keep an eye out for this.