Thanks for the app!
Though it functions beautifully, I've noticed one alarming but inconsistent glitch: On very rare occasions it completely bypasses my lockscreen. It's hard to say how many times this has actually happened as I have 10-minute timeout to lock and there were instances where it felt like I hadn't touched the phone in at least that long - but not that I could swear to. There have been at least a few cases where I know the phone had been untouched for at least 30 minutes yet the phone was unlocked even if I dismissed the notification. This is very rare & has probably happened only 4-5 times (that I'm reasonably sure of) over the past few months. I'm not sure which notifications are the trigger (if there even is a specific trigger,) but I think they were probably news - BBC/NBC/PBS, etc. With such alerts I normally take note that something happened & dismiss the alerts.
Wish I could provide more info, but I'm rarely paying much attention when alerts pop up & by the time I realize that something weird just happened I've already forgotten precisely what triggered it. Nexus 5, Stock, Unrooted. Using pattern lock.