Strange chat server behaviour. Move was played without my input

In game lichess.org/FtrXvH0lTr1Z move 26 Qf4 was not made by me. The chatserver magically played it by itself without any of my input. The subsequent exf4 almost happened immediately.
I have no idea how this is even possible.
Is this a known bug that players are exploiting?

Are you sure you didn't missclick. Even if you didn't I don't think that this is a specific bug getting exploited.

Let's calm down. It might be a small bug. You can either signal it or talk to a moderator and see what happened.

Regards.

I am quite calm. I am sure I did not click by accident. Hence my report.
Since this is rather strange application behaviour I am sure developers would like to know about it. I was of the belief that this is the right place to raise bug reports.

@pynchonian of course, thank you for your report I believe that moderators would love to answer you so don't worry.

had such a similar thing too, game was lost anyways