Can't add New skin to the favourites without removing another existing

Product: Apex Legends
Platform:Sony Playstation 4
Please specify your platform model. Sony PlayStation 4 Slim
What is your gamertag/PSN ID/EA Account name? Matteo90Fi
Please provide your squad mates' gamertag/PSN ID/EA Account name if possible.
Are you using any software with an overlay? No
Which Legend were you playing (if applicable)?
Which Legends were your squad mates using (if applicable)?
Where did the issue occur? In the lobby (waiting area before the match)
Which part of the map or menu were you in? If you don't remember the exact name, please describe the area or what you were trying to do in the menu. Equipment > SMG > Alternator > Skins
What were you doing when the issue occurred? E.g. respawning a squad mate at a beacon, using an ability, a squad mate left the game. i was adding one weapon skin to the favourite ones.
Did your squad mates also experience the issue? I don't know
How many matches had you played in a row before the issue occurred? not relevant
When did this happen? (dd.mm.yy hh:mm)
How often does the bug occur? Every time (100%)
How severe is your issue? Major impacts to gameplay
What happens when the bug occurs? when i try to add one weapon skin to the favourite ones, the system removes one of the other favourites from the favourites, and still when trying again.
What should be happening instead? it should add to the favourite ones, as the limit is 8 per weapon.
Steps: How can we find the bug ourselves? try with this version on PS4

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when i try to add one Alternator skin to the favourite ones, the system removes one of the other favourites from the already existing favourites, and still again when trying with the new "unfavourite" one.

i believe the max limit of skins per weapon is 8, and i'm talking about 5 or 6 skins.