I bought this car used and in about a month or two, I noticed an issue with my left turn signal. The signal flashes irregularly some times with really fast, and flashed sometimes not at all. It has taken me a little bit of time to finally catch it on video but I finally got it! I've noticed that this issue only happens when it rains or is extremely humid out. Since I finally have proof I will now make an appointment to have this issue looked at. I'll update after the appointment.

Update from Oct 11, 2019: I finally made the appointment, but it took two visits to get the issue repaired. My first visit was short and sweet. The dealer pulled my car in and checked out the left turn signal. As expected they couldn't reproduce the issue. The mechanic ended up replacing the bulbs and cleaning the sockets, he even added a lil grease to make sure there isn't a moisture issue. I knew leaving that this wasn't going to fix the issue to the point where I made a joking comment that I would probably be calling for another appointment on the ride back to where I was going.

Luckily I didn't make it out of the parking spot and the issue showed its ugly face. Quickly running back in to grab someone I was dealing with I got what I knew my car needed. They ordered a new multi-function switch. Today was the day for the repair which is only about a week after my original visit. About three hours later and two Lyft rides my Tucson is fixed!!! I hope. If I have any further issues with the turn signals I will update.