Now, China is competitor number 1, so I don't think they would, (unless China agreed to do the same at its borders). And is not like Iran is not tolerating countless U.S. military bases around its borders, I just suspect they're at the edge of their seats, expecting an attack and sending an armed drone to their border doesn't seem too friendly.
The U.S. also knows that Russian planes flying are not there to bomb them, whereas the Iranians are hearing constant rhetoric that the U.S. is just about to bomb them.