Common and generally not a problem besides an annoyance.
Intake leaking
Water pump to timing cover
or timing cover to block.
Those are the most likely culprits. Although the intake is the easiest, look for a coolant trail running down from there. Usually not, which make it the timing cover. Water pump builds pressure with RPM, so it is probably a high RPM water leak. If it is just annoying and not a bad leak, wait until you do a waterpump or timing chain. Unless you recently just did one of those.