Hm that is weird.. Have you tried going back to ART to see if it works like before? If it is only not working in Dalvik I'd do a factory reset once on that.. Just to see if it helps. I am not sure what else would cause that.
You can try clearing cache from recovery then reboot (dalvik) and see if the problem is fixed. Also, make sure the appropriate notification options are enabled via settings.
Davlik cache wipe from recovery seems to have done the trick. First wipe seemed to hang. Rebooted and did it again. Completed successfully and light returned to working status afterwards.
Weird, but glad it's fixed. Thanks for the suggestions, guys.