Possible Facebook exploit via tinder app?

Has anyone heard of anything like this? This morning I received a message from a tinder match immediately upon getting the notification. The first couple of times I responded, I got instantaneous bot-like responses unrelated to what I had just typed (and unreasonably sexually-explicit to boot). After another response, tinder reloaded the facebook login page and gave me a message saying facebook had already been authorized. Wasn't sure what to make of this, so immediately changed facebook password and blocked this bot/weirdo just to be safe. Never posted to HN before, but curious if anyone had heard of exploits through the tinder app...