Sometimes her triggers are unjustified and sometimes they are justified.
A justified trigger is a reaction that most people would have.
For instance if you are ignoring her while you are on a date, her response is a justified trigger.
This means that most women would get offended if you take them out and get distracted on your cell phone.
She might overreact but your original behavior could be shifted as well.
Unjustified trigger?
She sends you message and you don’t reply for 30 min because you are in the middle of something.
Overreacting because she didn’t get a reply from you within 30 min?
That’s unjustified, right?
Why? Because it is common to have a delay between messages.
If you don’t reply for 3 days and she gets triggered? 
That’s justified.