VS breakpoints don't appear to work

Hello All,
I am using VS 2017 and OF 10.1 and Visual studio seems to be ignoring any breakpoints I set. I am not sure the problem is OF specific. Steps:

  1. build simple OF project (using DEBUG x64)
  2. set a breakpoint on any line inside my ofApp::setup() function. (little red ball appears on left margin)
  3. Debug > start

Program runs, but breakpoint is ignored. I see the breakpoint active in the breakpoint window. Maybe they are disabled globally somewhere ? (I’m not an VS expert)…