Just before midnight I was one floor away from a Platinum Cube Chest when the game disconnected fore seemingly no reason (connection was fine as my Discord call and other connections were uninterrupted). The loot I could live without but my ticket having been consumed means not only can I not go back in for another attempt but also prevents me from progressing the associated welcome/guide quest(s).
Welcome to the Lost Ark forums!
I’m sorry for this sudden disconnection that you experience and thank you for bringing this up to our attention.
I recommend to get in contact with a representative from the live channels or submitting a ticket for this issue to be check by the correct team as soon as possible.
Have an amazing day!