Hello mono2448, growing BOP indoors is really a challenge. I don't consider it a good candidate at all for indoor growing, unless your area is a year round tropical area. Nice if there is a good south facing window you can position it or a nice skylight above it.
But to answer your question, I would agree it may be experiencing humidity issues. They flourish so nicely outdoors in full sun with frequent rains and humidity levels at least 60% and higher. Some would try to increase humidity by grouping plants together, or have an indoor water fountain. To a certain point you can increase watering, but still got to allow some dry out time, roots need to breathe too. It all depends on your existing ambient conditions there.
We all have varying growing areas, so what works well with others may not apply to you. Good luck, keep us posted how it goes!
