key press bug?

so i was converting a project of mine that has mouse down and key pressed blocks, but when i try to press down a mouse when its waiting for it on the html project, it doesnt proceed then softlocks, is it a scratch bug or a bug in htmlifier?

Could you attach the project file?

Its not a bug even. You cant control two input sensors at a time. that's why Griffpatche's two sprite controller at the same time was famous and useful!