Radiator problems of the 2014 Ford Fiesta

Saturdat July 30, 2019my vehicle overheated. Vehicle was taken in for cooling maintenance. Radiator thermostat and cooling reservoir was checked. I was advised to monitor the coolant level. On aigust 10, 2019 while driving 75 mph, the temperature gauge displayed "overheating". I pulled over and opened the hood. When I open the hood the coolant was boiling. I waited 20 mins for the boiling to subside. I slowly removed the cap and the coolant level started to rise which was the same issue as before.

Tl-the contact owns a 2014 Ford Fiesta st. The contact received a NHTSA notification recall number 17v-209000 (engine and engine cooling). The contact took the vehicle to the dealer covert Ford hutto texas 1200 us-79, hutto, TX 78634 and they found nothing wrong but said to monitor the coolant level. The contact stated that while driving at 75 mph the dash temperature gauge showed overheating. The contact pulled over and the engine died and would not start. The vehicle was towed back to the dealer who diagnosed it and said it had nothing to do with the recall. The dealer stated bugs caused the radiator to crack. The manufacturer had not been contacted. The failure mileage was 80,500. Tf.

I bought this Ford Fiesta with the 1. 0l ecoboost new. All maintenance for this car is uptodate no mechanical problems with the engine until oct 10, 2017. I noticed the coolant level was well below the min. Line of the coolant reservoir almost below the turbo coolant line in the tank. I immediately found some approved coolant and added it until the max. Line. There were no warning lights and the car didn't overheat the day before. I checked the coolant level 3 days later and found that it was halfway between the two lines on the tank. I filled it up to the max. Line. I checked it again on sat. Morning of oct. 21st. It had dropped to the min. Line. I thought this was a definite problem. I checked over the hoses and looked over the engine block, the intercooler, and what I could of the radiator, but I didn't see signs of coolant leaking. In less than two weeks I put 3/4 of a jug of coolant into my car and it only had about 36000 miles on it. I brought it to a local Ford dealer on sun oct. 22. And the techs did a diagnostic and pressure test on mon. He called me to say they couldn't find anything wrong. I told him of the amount of coolant so he thought to recheck. The dealer did a total of 3 pressure checks on the car with no leaks. I asked if he could check the exhaust for coolant out the tail pipe. He said that if it was doing that the car would be running rough but it ran fine. I'm picking the car back up since he said they couldn't do anything more. It doesn't make sense, where did all the coolant go? is my car going to overheat and do something like the other ecoboost engine problems, including engine fires?.