GG Blizzard. I went to My Collection -> Filter -> Wild in order to disenchant all the cards that just rotated out in the new expansion. Little did I know that this filter is broken and includes all standard cards as well 
Thousands of euro down the drain - Pay2Win btw. Thanks for nothing and last time Iâm signing in 
Hm, not sure it is Blizzards fault. Standard cards are playable in Wild, so no surprise they are displayed when âWild Cardsâ is selected in the filter. I agree that it is maybe a bit misleading. âWild Cardsâ can be understood like âWild-only cardsâ, even though it displays Core + Standard cards too, not just cards from Wild sets.
I agree with you to a certain extent. I definitely agree that itâs misleading and this is an example of what can happen. I hope blizzard will do something about it. At the very least, I hope this will create awareness for other players so the same thing wonât happen to them 
Actually, Iâve read a book on design of âthingsâ (The Design of Everyday Things by Don Norman) and I think it was there, where the autor stated that it is designerâs fault when a user makes a mistake Maybe, with some usability testing, blizzard could have discovered that not everybody sees âWild Cardsâ the same way as they do.
In every expansion you could filter as âwildâ and disenchant those cards to get dust. They changed this in this expansion, so I also disenchanted almost all my legendaries. Blizzard is turning in to a real sh*t-show.
R.I.P
FYI. After whining a bit to blizzard about it and being angry most of the time, they offered to restore my account to the point (31st march) before I disenchanted it all.
They admit itâs a design fault and therefore offered me this. TO ANYONE ELSE WITH THIS HORRIBLE EXPERIENCE, I HOPE THIS HELPS!
That is great news that they reacted this way! TY for info!