Upvote:3
TL;DR: You're probably OK.
Since none of your individual visits exceed 90 days (it's 86 days from Jan 1st to Mar 27th), you have not violated the Visa Waiver Program rules and continue to be eligible for ESTA. (See this answer on why ESTA and VWP are different.)
Unlike Europe (Schengen) with its 90-days-in-180 rule, the US does not impose an exact limit on how long you have to stay away between visits. CBP website:
When traveling to the U.S. with the approved ESTA, you may only stay for up to 90 days at a time - and there should be a reasonable amount of time between visits so that the CBP Officer does not think you are trying to live here. There is no set requirement for how long you must wait between visits.
Now obviously "a reasonable amount of time" is open to interpretation, and you might well get denied entry if you arrived in the US and said you're going to stay for three months again. However, in this case you have a connecting flight immediately out of LAX, so it's unlikely that the CBP will think "you are trying to live here", especially if you're a citizen of South Korea and returning home (are you?).