Did not receive reward from the invitation event

[Killmeplese123]

Server:

Character Name:

Account ID: 40883377

Device(optional):

Estimate Time of Problem: 10pm HKTime

Problem Detail: I invited my friend to play the Heroes Arena yesterday night. He downloaded the game and we had a game together yesterday night. The invitation event has shown that I have received the reward for "Acolith" however he is still unavailable for me.
Screenshot_2020-08-14-07-54-33-427_com.ucool.heroesarena.jpg

Screenshot_2020-08-14-07-54-33-427_com.ucool.heroesarena.jpg

[Killmeplese123]

Server:Asia
Name: killmeplease123

[Killmeplese123]

It happens again, please help.