Never had a leak in my 2012 V-6 ragtop. Just purchased a 2019 GT Premium convertible and so far all is solid and dry. First thing you want to do is get the car completely dry. Next, it would be best to isolate the source of the leak, but that may be difficult. The only suggestion I have is to bring the car to your dealer to have it examined by a professional who repairs/replaces convertible roofs. Your dealer likely does not a full time specialist, but most dealers have a specialist who visits weekly and spends time in the shop, depending upon how much work they have for the day. A specialist will know where to begin searching for the source of the leak based upon where the water was found. He/she will likely have some idea of what to look for or how to duplicate the problem.
Sometime back I had a piece of foam that detached from a convertible roof bracket on my 2012 V-6 Mustang. My Ford dealer's quick lane service center (no appointment necessary) glued the foam strip into place several times. Finally, I made an appointment at the primary service center and they had a specialist who replaced the bracket. That took care of the problem.