Paph delenatii problem

[Jeremy]

My paph delenatii suddenly stopped growing and I cant figure out why. Earlier this season it stopped growing and I repotted it and then it started growing again. Then for the past week it stopped growing and I am concerned that the new growths are too small to flower the main plant flowered nicely last season. The new growths( the entire plant look like a bush) are small and growing too slowly to reach the same size as the main plant to flower in January. I think the conditions are right since next to the delenatii, there is a paph maudiae that is growing rapidly, and phal. schilleriana which is growing like if it is on steriods. The only thing I could think of that could seize it from growing was putting in in a bit more shade since it was burning from too much light. Does anyone have any experience with these plants or any recommendations? thanks