Idea breakpoints sometimes not being hit

I have some breakpoints in an application. If i send request to web server ( spring ) sometimes program stops at breakpoint, sometimes doesn't. 

for example if a send 10 requests to localhost:8080/get/getSomeThing

only 1-2 times program stops at breakpoint.

not: breakpoints aren't in conditions like if else or something smiliar. I mean there is no way such a scenario like breakpoint was in the else statement but program executed if statement..