RC halts at Londa for 10mins, though TT shows its 2mins, its given slack from Khanapur-Londa so TT does not show it as 10mins. Slip coaches get attached at Londa, hence the 10mins halt. Goa never gets rescheduled as it has an extra rake.
I feel its safe to try Goa/RC combination changing at Londa. Others who may have actually tried this can suggest better.