Buggy switch to Screen1

Dear developers,

after I made a function component on Screen 2, I wanted to get the function component to start the function. Everytime I click on the function tab on the left the regular displaying is loaded for 2 seconds and then the Screen is automatically switched to Screen 1.
I use Stack Navigator with two screens.

Can anybody confirm that it’s not possible to use functions on Screen2?

cheers,
User81

I found a workaround:

make the function-block and the corresponding start-function-block on Screen1 and use Ctrl-c and Ctrl-v to bring these two blocks to Screen2