Platform, device version and operating system
Screenshot or image
What you were expecting to happen, and what actually happened
[SPELLEFFECT_CAUSERANDOM] tag has listed in spell effect filter.
Select it, apply filter then nothing displayed.
Reinstall game did not fix it.
How often does this happen? When did it begin happening?
always after 4.0 update
Steps to make it happen again
Open troops, pulldown Spell effect