I posted about this here. I changed back to default theme and not doing it anymore.
Have you guys (who are using the bootstrap theme) not noticed the same thing happening to your site!??
So I assume it is Bootstrap + some plugin. You should switch back to bootstrap theme, disable one plugin, test if the problem prevails, disable the next plugin, test if the problem prevails, etc.
By the way: one discussion for one problem usually is enough.