Top photo is bud blast on that cattleya. The bottom photo is sunburn. If you are misiting, don't do so in the hot of the day. The water drops will act like magnifying lenses and increase the heat to the plant. Mist in the early morning and keep the fan running. If the sunburn is 'new' then you have some direct sun-light hitting this plant and need to move it away or filter it through some sheers or shade cloth.
The bud could have blasted from many different things. Humidity is the most likely the problem, but it could be something else. Usually this happen when there is not enough humidity. JMHO