Potentially bugged returning player mission rewards? (5* weapon shards)

[short vessel]

I am a recently returning player and have completed all of the returning player missions.
However after about 12/13 days having returned to the game, i have by coincidence heard that one of the returning player missions awards one with 450 5star weapon shards.
That striked me as very weird since i knew that i hadnt enough to buy one so far on top of being 100% sure i havent bought one since returning.
I double checked wether the rewards may have changed, or wether i havent claimed them by accident, but it tells me i have them claimed and the rewards havent changed.
(Device ipad air 4rth gen)

Here we can see i have claimed it and that it was still 5star weapon shards

And here we can see i have only 150 of them (which i have gotten from this weeks coop rewards)

And all the 5* weapons i have are either from tutorial/beginner missions/beginner login (liv‘s 5star, bianca‘s 5 star and nanami‘s 5star) or from a lucky coop rng drop (changyu‘s 5star weapon)

The returning player missions will end for me in about a day, and it would be disappointing if 450 5star weapon shards just disappear without ever reaching my account, or if the Same happens to other returning players potentially

so i ask to please look into this

If any more information is required one can ping me to deliver it

Thank you in advance

[frigid tapir]

New mechanical in game is PET(CUB) does not have gamepad config.... I can't play comfortable now

[vital bay]

I buy a fragment in the store but it doesn't appear to me it's like I don't have it yet