Seems about right then to me. As I said, it is very, very rare. You definitely notice when it happens though XD

It also helps that I'll buy helm + health so it has more time to happen.

Zero, any chance you can get the "enemy has immunity" message to only appear when someone has a lace (or skill equivalent) while in range? It is kind of annoying to see it 100% of the time whenever someone on the other team has a lace.