I do not have any additional information.

Safari

boardgamearena.com/9/thecrew?table=154852621

The same thing happened here

Mueman had commed the blue 4 as his only card of that colour

He could not follow suit and the game engine auto played the communicated card

Ruined that round as we failed the task.

To follow on this was mission 23 in game boardgamearena.com/9/thecrew?table=154852621

We started the 3rd trick of that round

I had the same thing happen in a few games last night and realized what might be happening - after clicking to give communication on a card, it remained highlighted (likely due to a double-click) so that when it came back to my turn, the card would automatically play. If it is possible to clear out any card selections before it comes to your turn, you can ensure someone doesn't accidentally play a card by having it pre-selected before their turn comes around.

boardgamearena.com/3/thecrew?table=240882634
Move #83

Similar to the last comment but in my situation I clicked the Communcation card during the previous trick and must have then clicked the Blue 8 card to communicate that it was my only Blue card. Decided to Cancel the communication when prompted to but when I hit the Cancel button, it played the Blue 8 card automatically.

A solution (if possible) is to implement some sort of confirmation request an undo before committing the card to the table and revealing it to the other players?

Thanks.

This is exactly what players I've discussed the "communicator bug" with are referring to. It is possible to signal for communication, and then because you do so essentially simultaneously with the player whose lead it is selecting a card to play - and the UI does not stop to warn the would-be communicator of the change in game state - the would-be communicator's next click selects a card for play, instead of selecting the card for communication. In real-time games, this can be a serious problem.

A straightforward fix would be for the UI to lock out card selection for play as soon as communication is signaled, and not to enable card selection for play again until communication is either canceled or confirmed; that way, there would be no possibility of a click intended for communication to instead result in a card being played.