New RT-AC86U: System Log

I just installed the AC86U last night and noticed the system log creates an entry every five minutes:
kernel: thfsplus: walked past end of dir

I upgraded from the AC68U and never had this issue. Anybody know why I am getting this logged every 5 minutes? I don't have time machine enabled and only have a hard disk attached to the USB 2.0.

Thanks for the help.