The breakpoint failed to bind - I upgraded from Visual Studio 2013 to 2017 and now I am having trouble with breakpoints

I just upgraded from Visual Studio 2013 to 2017 and now I am having trouble with breakpoints.
It's a hit or a miss where break points will actually work and if I set one while debugging I get the error:

The breakpoint failed to bind.

I solved it disabling "Optimize code" option in project properties Build tab.

more info here:

https://stackoverflow.com/questions/31732944/breakpoint-failed-to-bind-visual-studio-2015