Was editing a Paradox build while queuing for a match. I was selected as Haze. The shop remained open with the Paradox build after loading in. When I tried to switch builds, my saved Haze build was gone with only default as an option.
This just happened to me too. I was editing a Billy build while queueing for a match. It placed me into a match as Vyper but my Billy build was still open after loading into the match. When I checked my build list to switch to an actual Vyper build, the build I had made for Vyper was gone