It’s not clear to me that you’ve tried debugging your blocks in any methodical way. You can try this:
And then report back where in your code the problems seems to be. For example, you are checking the value of a switch and only navigating to a new screen if the switch value is true. Is it actually true when you assume it is? How have you confirmed that? Another method is to add a vibrate block and test it on a mobile device. If you feel the vibration, you know that part of the code was run.
Is the user being taken to a different screen than “Food Category List”? You said that happens automatically. Nothing in Thunkable is automatic. You either have a block that does something or you don’t.
More details would be helpful.