Engine coolant hose pops off with too much pressure?

Hello!

About a month and a half ago, I hit a pothole that caused me to have to replace the front strut spring assembly, and now I'm having an issue with a heater core hose popping off with too much pressure. We replaced the fitting thinking this would help fix the problem as it seemed like only the fitting was broken and replaced all the coolant and bled the air. After I got the car home and it cooled over night during the next morning, I was able to drive for about a mile or so give or take, before the engine started over heating again, I checked under the hood and the same heater core hose blew off but the fitting this time was undamaged. When this happens, I do see white smoke coming from under the hood and behind the vehicle but unsure if it is coming from the exhaust pipe or not as the smoke covers the whole back area. Could this be a head gasket issue?