Probably P, maybe even likely. Until you waxed poetic on its importance I really hadn't given it much thought. I started adding flowers to my worm bin toward the end of last season and gave an occasional F&F watering, but this plant is the first with any attention paid at all to it. The next plant got my top dressing and F&F since early on, and the following plant, the Net Pot SIP, will be the first with the flower crumble added to the mix.This could mean that the molasses jacked the brix and the soil doesn't quite have enough P in it to hold it. The plants aren't photosynthesizing enough sugars for exudates.
So, things operate on garden time in Aziland and I'm slowly getting to where I want to be.
I do have it on my phone but more as a curiosity. There's not much I can do given my environment, but I did lower the plants given the recent heat wave.. I think P is your problem, or you aren't supplying enough light. Do you use an app like Photone to measure your light output?
Steady to rising.How is your weather, is pressure low?