Ritual did not allow to choose which card to trash

[kieranmillar]

Had a game where my opponent bought Ritual, unfortunately it did not let him choose what to  trash and automatically trashed a curse, despite other cards being in his hand.

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Turn 14 - Boba_Fettish
B plays a Scheme.
B draws a Sentry.
B plays a Sentry.
B draws a Copper.
B reveals a Silver and an Estate.
B discards an Estate.
B topdecks a Silver.
B plays a Crossroads.
B reveals 2 Sentries and a Hermit.
B plays a Torturer.
B draws a Copper and 2 Silvers.
B plays 2 Coppers and 2 Silvers.
B buys a Ritual.
B gains a Curse.
B trashes a Curse.
B topdecks a Sentry.
B draws a Copper, an Estate, 2 Sentries and a Hermit.

You can see by the crossroads play earlier in the turn that he definitely had a sentry and hermit in his hand.