[2020] Match Draw in Squad Arena, Fleet Arena, GAC after less than a minute

I just took JKR undersized against g12 Rogue One in GAC. My final battle to do a complete clear and within 1 minute, SWGoH declares this match a Draw.

This has happened to me many times now and I've probably just lost this Grand Arena because of that (opponent hasn't attacked yet).

Can someone please confirm that this happens to someone else!

What might be the cause of this? Is it a bug or is my opponent cheating? I'm pretty sure that it's a bug rather than cheating, but I don't know enough..

https://preview.redd.it/65cm09s9wm551.jpg?width=1790&format=pjpg&auto=webp&s=5047f6c27d8b8f7d3d0be56b2a3f03d9da4c9ee4