I have been continuously facing this problem. Reliability of form submit event to be fired is very less. Out of 10 times i am getting form submit event for 1-2 times. I have upgraded from tracker version 2.8 to 2.14 in the hope that this would have been fixed because the same issue has been discussed by someone in the discourse earlier.
Few points i would like to tell.
I am not preventing default action of form submit i.e
I have tried changing
pageUnloadTimervalues. I even set it to
pageUnloadTimer: 2000. 2 seconds are more than sufficient for the events to be sent before page unloads.
Below is the tracking snippet
Your help is indeed needed.
Thanks & Regards