Tried submitting a bug report yesterday but the function was broken.
My friend and I were running through a Candlestick Keep (T2, I think) and came to a door that needed to be opened by lighting 2 blue candles. On my screen they were lit and I tried hiding in one of them to avoid a Grimalkin, but was hit anyway. The door only opened when they were both "relit" by a fireball but on my screen they were lit and blue the whole time.