@trishhfernandez do you have your projects' Completion Mode set to Automatic?
We do, so the only issue I can think of off the top of my head that I can see our users doing is when the last user on the last task marks their task complete, then goes to log their time and they can't because the project has completed.
Those users who tend to have the last task would need to re-train themselves to log time before completing tasks.
And I'd probably have more questions from those users who only occasionally have the last task and forget they need to log time before completing their task.