Hmm, that's unusual. Are you using the standard state_switch() or are you trying to use the queue system? To be honest, the queue system hasn't been super well tested (not many people use it) so there may be some bugs with it. If you'd like to reach out to me on Discord, I'd be happy to help.
Viewing post in TrueState - Finite State Machine for GMS2 comments
Absolutely! You are always welcome to ask me questions on Discord (that's just the easiest for me). I also recommend joining the GM discord server if you aren't already a member. It's a great place to get help with just about anything GM related!
https://discord.gg/By6u9pC