Are you saying nothing showed up in the injury report? Because seeing the "Injury timeout" banner without an actual injury scene means the injury was off-ball - not involving the ball carrier. It's been like this all year and was a design decision for '18.
If you didn't get a pop up a few plays later or nothing got listed in the pause screen injury report, then there'd be a problem. I had several minor injuries in my first game (playing at the CFM default of 40) and all of them showed me a pop up and were listed in the the report after a few plays.