Humidity has the same effect as steam which is partly at play with your jacket. Would wait for the jacket to dry out and settle to determine the effect of humidity and/or how much is due to construction issues.
The pulling at the button needs to be seen to analyze the fix. Could also be short back balance combined with the shoulder line. The bowing of the lapel is because you have to pull the jacket to button it. Causes the breakline to buckle and lift off your chest.
Talk to your MTM maker and don't mention my name. Say some random yahoo on the internet said so!
This picture was taken after the jacket had been sitting in my closet for a week, so I assume any humidity would be gone by then. At the end of a day of non-humid wear, it looked the same.
Thanks for taking the time to comment. If I discuss with the tailor, I will not use your name. You will be known as "some guy on the internet."