Shield doesn't work any more.

Hi, I wrote that message because I have two bugs to report in my Minecraft Windows 10 version 1.16.20 for PC. First when I try to use my shield, it doesn't work, when I use it the animation doesn't happen, and it isn't effective, the second bug is the skeleton attack animation, it doesn't happen too, I just take damage and sometimes fast than usual.

Thanks for the help!