Firstly, I love the latest update. When Equipd is run in split screen mode and I tap a note, the note window doesn't fit the split screen window. That happens even if Equipd is the primary app (on the left). I'm using an iPad Air 2 and iOS 9.3 (public release, not Beta).
Thanks for reporting this. Can't believe that neither I, nor my beta testers, picked up on this. I suspect most of my testers using the split screen feature are either on the larger iPad Pro, or using the 9.7" iPad in landscape mode. If you rotate your device, the size of the notes screen should fit ok. I will improve this in the next update.
This was in landscape mode. Plus, it also does the same when viewing Strong's definitions - although, I guess, you're using the same function for both cases. By the way, I'm happy to be a Beta Tester if you like.