winterized sprinkler dripping water slowly

During the inspection yesterday in Colorado, we found a winterized sprinkler system is still very slowly dripping water. probably one drip at the bottom of the pipe right after it came out of the wall every 3-4 seconds. The main sprinkler valve appears to be fully closed.
I am wondering if the valve failed to fully closed inside which caused slow water leaks to the pipe. If so the good thing is the speed of water leak is very slow. it simply drained outside before the water level raises up high enough to the rest of the system.
The other inspector was saying that it could be the water evaporation from the rest of the system and drained from here. But the winterization was done a while back, could still be dripping 24/7 like this?
Any thought everyone? appreciate your input.
Thank you

One post is enough… winterized sprinkler dripping water slowly

Didn’t get instant gratification, so had to post again.
Must have not read the part about non-members are moderated and posts are not immediately live.
Takes time for someone to ‘get around to it’.

Prolly, just that…