Hey everyone, new member and first post. I've got an issue and am hoping someone can help me out. I have a 2016 CX 3 Grand touring AWD that I bought new, have 95,000 miles on it. When the engine is hot and I'm in drive with ac off and foot on the brake after a few seconds my RPM's drop to 550 and the car shakes. When I let off the brake RPMs go back up to around 700 and the engine runs smooth again. The check engine light was on for a day then turned off on its own but got the p0300 code random/multiple cylinder misfire. Dealer couldn't work me in for a couple weeks when I got there they charged $125.00 to run the diagnostics and told me I needed new spark plugs so I replaced them and it didn't fix the problem, so a short time later I replaced the coils, still didn't fix the problem. Last time I talked with the dealer they told me it's normal for the engine to shake and RPM's to drop, but this only started in January and I've been dealing with it since. Any Ideas and recommendation will be greatly appreciated.