Atomic Bug

In this Game I've mated my Opponent.


But he's still able to move although he's mate.

In the analysis board his only option is to take my queen and win the game.

No..black can explode your king

It is part of the rules to win like this.

Quite correct. Mating by exploding an opponent's king can be executed while a player is in check.

I've had trouble with this rule as well, but it doesn't seem like a bug.

"Any move that results in blowing up the opposite King will claim an immediate victory, overriding all checks."

ja.lichess.org/variant/atomic

A checkmate is a [Check] that [Wins the game] because [The opposing player has no more moves] for their King to escape.

A [Check] that [Does not win the game] is not a checkmate.