Blueprint function library function not working

i am creating functionality like ball color all tiles then move to next level. my code works on level blueprint but i want to check it on every level then move to next level.so i write it in blueprint function library there it is not working . it move to next level without check the functionality whether all tiles colored or not .it move to next level without single tile colored.

event tick call the blueprint function library ,but without condition satisfied of checkallcolored function it move to next level

I made this ridculously simple tile check function:

And called it from the level BP:

It works fine.

Can you show a bit more info, like the level BP and the tile function?

thanks it done, i was not checking the return value.