Help needed! Noticed a “blister” on my aloe. There is one larger section on left leaf and a small dot on the right leaf. My routine and location have not changed except I put some Systemic granules in the soil ~2 weeks ago (I do this every so often) and spilled a few grains on one of the leaves, I believe it was the left one. I brushed them off but is it possible it created micro-tears in the left and caused irritation? I don’t see signs of mites or bugs otherwise, and have never before. Not sure if anyone has seen this before.