The fact that caps are growing/showing means the mycelia (mushroom version of plant roots) is really healthy, and likely staying moist... Because of that your plant loses space to grow its own roots and nutrients are being stolen.. I'd get a fungicide quick.. the mushrooms are pretty spread out, and you've got some yellowing at the bottom of your plant, either because of the mushrooms messing up soil (PH or nutes) Or..... You may be Overwatering. In theory your plant should be thirsty enough that there isnt enough excess water for other stuff to use/grow. Best of luck, hope I was some help
