The longer you play, the progress bar will keep beating when using medical kits, bandages, Epinephrine, regardless of whether blood loss is enabled, which will result in unusable, ModernFix was installed.
see the gif

The results were obtained on my server, they have been running for over a year
It's more likely to happen with more two players
How to temporarily solve: shake the view, hold shift or crtl, and jump, then maybe you can succeed, and hold the shield in the left hand with the right hand to use the item, then maybe you can succeed