I posted yesterday stating beta 2 had not fixed it, but like the previous poster's experience, Beta 3 has fixed it for me.
I have had this issue for a while--only the first note highlighting the text, when moving to another note, no highlighting. I just installed the newest beta. It is still NOT fixed on mine, and I thought this would have been fixed long ago. iMac (21.5-inch, Late 2012) Sierra 10.12.3. Again, many of us are paying and would like to see this fixed soon!