Pressing down two ImageSprites at the same time doesn't work

When I try to press two ImageSprites with the TouchDown TouchUp funktions the second one pressed (Spite2) doesn't get pressed down (the touch Down funktion doesn't aktivate) and if only releasing Sprite1, not Sprite2 the program still thinks that Sprite1 gets pressed (TouchUp doesn't activate).

Expected behavior. App Inventor processes commands one at a time; one after another. It is not possible to execute two commands simultaneously, they execute asynchronously. AI is not multithreaded.

The model of event processing in App Inventor!msg/mitappinventortest/m8i32I2m200/Am3VYo3DTIUJ

Try this:

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