Weed could be causing mild anxiety, enough to cause the sweating...and you say some more than others so that makes sense. Some strains give me anxiety on occasion.
Opiods make me sweat buckets from my forehead!!
I sweat from stress and anxiety, shit sucks. It does make quite a bit of sense that if you are on the borderline for that reaction in general that adding weed could push you over into it. Doesnt help that I tend to only smoke speedy sativas.
Totally random speculation, but maybe one of the varieties with some cbd in it would help, supposed to be a heavier on the relaxing aspect from what I gather.