Note: Check your settings from time to time as I have seen some of my changes revert back to defaults!
Since I have different customized setups saved on my wheel, I have found that if I launch Shift 2 with the wheel set to anything other than 900 Degrees sensitivity - some of the settings change in game and I get the 270 max lock!
I also start a quick race and drive through a few turns and over rumble strips to test that my FFB is working properly and pause / unpause the game if it's not to get it going (sometimes I have to also power off/on the wheel also). Once the FFB is working properly in quick race I can then go to career or online and have no FFB issues or dropouts for my gaming session.
Once i found out through isidesimracing.com about the bug i have not had issues since. The patch also helped tremendously as well.