@Big_S
What you are doing, using Navigate inside Concurrent - that's not allowed or supported in PowerApps.
In your case, you can resolve this by moving the Navigate to a chained statement i.e. where you have Clear - or after Clear.
You cannot use Navigate inside Concurrent.
It doesn't even make sense actually that Concurrent would work with Navigate inside of it, if you think about it.
In fact, there is a specific error invoked that only happens if Navigate is inside Concurrent. See tested example below.

Remove Navigate. Or take it out of the Concurrent and put it as a chained statement with semicolon.