Minecraft tablist is not working?

I have the following problem:

When I play Minecraft with friends and then write something, my friends can press the Chat tab and other players will show up and I will not.

And I use Bac and in normal Minecraft it works

To my knowledge you have to use the first letter min. Entered

I already did not work, but thanks anyway

Oh then I have no plan what could still be you all play in the same version z.b. 1.12.2?

Is that the case with a server? Or with several?

For several