When Mojang fixed this bug a while ago in 1.17.0.54 Beta, This bug was still remaining. Android players can now host worlds whether on a Wifi or Cellular BUT they cannot receive invitations on both. iOS users can however receive invites but not Android users.
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Thank you for your report!
You are right issue still occurs.
We're tracking this issue in MCPE-54902, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
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