Nested IF statements returning 'FALSE' on time check

Cross-posted at https://www.mrexcel.com/board/thread...check.1215144/

I am trying to write a formula to show the below:

General rule: If actual (C2) or forecast (B2) time is less than start time (A2) + 15mins then return status (D2) "on track", if its more than or equal to start time + 15mins then return status "late"

What I am trying to also include is a rule to check if actual time is 'blank' then use the rule against forecast time but if actual time is filled then over-ride the forecast time formula and check against actual time instead. I've written the below formula but is returning 'FALSE' when i have filled in actual time. Please help!

=IF(C2="",IF(B2<A2+TIME(0,15,0),"On track",IF(B2>=A2+TIME(0,15,0),"Late",IF(C2<A2+TIME(0,15,0),"On track","Late"))))

Screenshot 2022-08-30 173116.jpg