Highlighting works on all but one kepub...

Hello, I'm not really sure what to say. I have had my Kobo since November, and have had very few issues with highlighting and note taking, but recently I am having issues (but only with one book!). I purchased the ESV Study Bible recently, and for some reason I am unable to make notes or highlights in this kepub. I have tried MANY times, and have only been able to successfully highlight something once. Every other time I drag my finger over the selection, press the highlight button, and nothing is highlighted! Any help or suggestions would be awesome.

Model: Kobo Glo
Firmware: up to date
Book: ESV Study Bible (kepub)

Also, I don't know if this makes a difference, but the file for this Bible is HUGE (just under 100MB)!