Strange, it works fine for me. Maybe you can try to resett your savestate.
I just tried that but it still happens for some reason, it might be something on my end so ill try to check it out when i get the chance (probably not gonna be anytime soon tho)
also theres a bug where if you press the right button on the keyboard in the shop menu, it brings up some other shop. (idk what that is yet, didnt progress too far into the game to know what it is).