I was playing Sealed Lorwyn and was 6-2, and about to win my 7th game.
The game took a very long time with a slow opponent. Then his deck ran out, so he did one final desperate attack. All I had to do was block and I’d win, but for some reason my client crashed!
I opened the client as fast as I could, but once I was back in I couldn’t drag/select any characters to block.
I tried reopening the client and again it didnt work.

My opponent had this elf that when it attacks it has to be blocked if able. So The first thing I did was assign one creature to block that elf. Instantly after I did that, the crash occured. Ever since I logged back in, assigning any blocker became impossible.

I ended up losing the game by running out of time to assign blocks. It felt like the game crashed and couldn’t handle block assigning as soon as that elf attacked… his entire board hit my face and I couldn’t do anything.

Most frustrating experience I ever had playing… this was a guaranteed win in a paid format, so missing out on gems because of a bug is super frustrating.