Interesting data point. I was also on a connection (17 hours) from KMG in China on KE the night before and they had no problem interlining my bag to HA even with the long layover. With the longer layover I got a hotel for some sleep as well but off airport and also went into Seoul. During that whole time it seems KE held on to my bag and then nicely passed it off to HA where it arrived without problem in HNL today.