Why is Construct suddenly broken?

Like I'm very confused. All of my buttons on the starting layout of my game wont stop flickering and for some reason no matter what I do I cannot change the animation nor frame of anything on the starting layout either. And like, I'm especially confused since I went back to my arcade upload and for some reason all versions the game on there suddenly have flickering buttons on the starting layout too (the animations were something I was adding in the update I was making). Like what suddenly happened that just broke everything?

What browser are you using? Do you see the same issue with a different browser?

What browser are you using? Do you see the same issue with a different browser?

I'm just using Google chrome. It's legit not letting me alter anything on the starting layout with events. I just tried doing an event that on left mouse click spawn an item at point 0, 0... and it still won't do that. Like the starting layout in the editor and in the Arcade version that's been up for about a half a year just randomly stopped working for me.