Hello,
I am using Deja Calendar and Tasks.
I will usually get a notification at the set reminder time. If I don't dismiss it, it will often times disappear from the top bar for a bit and then re-notify me about 3-5 times in a row until I dismiss it.
I checked all the settings and do not have the persistent box checked or anything else that would seem to cause this.
Any help would be appreciated.

Samsung Note 3 running 4.4.2