Running a new instance of the emulator crashes the other instance
As of 1.5.0-827-g9e05d09, running multiple instances of the emulator is possible up to the point of loading a game. As soon as both instances are running a game, one of them crashes, either silently or with a regular crash prompt. I found the following in the log, not sure if it's relevant but it's the last line in the log:
[WARN] unhandled exception pc=00000000009bd00d fault_addr=ffffffffffffffff
The crash happens even if each instance is a separate executable located in a different folder, and it doesn't seem to matter whether both instances are running the same game or not.