Question [Q] Copy crashes apps

hello guys i am using Nexus 7 with android 4.3 (non rooted version)

from past 2-3 days Nexus 7 has started crashing the app when i would copy something to clipboard in that particular app. Happened in messages, contacts, gmail , youtube , pocket, and so on ...

but no1 has figured out a fix yet.
I really don't want to factory reset -_- but if I have to i will. anybody?

rebooting tablet solves the problem for few hours but after that same bug appears again

plz help.