@Alexey Belkov [JB] just happened to me again. I had a variable that I was using in my file, and I deleted it. It took 15 seconds for the file to "understand" that the variable was deleted and it error highlighted the one place where it was used.
In this case, the IDE didn't "hand" or become unresponsive, it's just that error highlighting was slow. What should I do in this case to get the right data to JB?