pest damage?

i noticed this spot develop over the last couple of weeks on my anthurium dark queen’s leaf. is this pest damage? it looks like it’s going to continue down the side of the leaf, i can see more discolouration below the dead tissue.

i haven’t found evidence of pests on any plants, nor on this one. no bug bodies or poop, nothing crawling in the soil. i’m dreading if it’s thrips and they‘re inside the tissue…….. i’m in canada so we don’t have systemics :/