I'm using the cm-12.1-20160207-NIGHTLY-h811.zip for the H811 T-Mobile variant and I am unable to get the lockscreen settings to work nor am I able to open security settings without the settings app crashing. Everything else seems fine? I'm not sure if anyone else is having the same issue. It doesn't matter which nightly I use, same result every time.
Downgrade bootloader and modem to v10.