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.
@hgtonight was assuming a JS error in some of the other discussions. So have you checked the JavaScript console when that error happened? Maybe there is already a valuable hint and you do not have to go through that disable/test procedure.
By the way: one discussion for one problem usually is enough.
Comments
NO!!!!!!!!!!!
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.
@hgtonight was assuming a JS error in some of the other discussions. So have you checked the JavaScript console when that error happened? Maybe there is already a valuable hint and you do not have to go through that disable/test procedure.
By the way: one discussion for one problem usually is enough.