command block it just does not store the data

When ever I try to use a command block it just does not store the data of what I put in it

1 go into a realm

2 get yourself a command block

3 type stuff into the command block

4 exit the command block menu

5 click the command block to see if the data you put in it is gone

this link leads to one of my Xbox clips since I cannot post the full video because of the 10MB limit, or if you do not trust it just go to my Xbox profile named "Cupsi gaming" and see the clip there instead.

to see the video of what is happing go here ---> https://xboxclips.co/cupsi-gaming/79bb0aff-5880-4d8a-a15d-20f87b4e806c