Fatal Error vector after update to ue4.18

Sorry for my langueage but I am literally Pi***d off now. I was testing my game and realized that my code did not work properly anymore- even though I have changed NOTHING!

The issue I’m having is that for some resons the vector for my movement of an object across the screen results in a wrong value for sure! This blueprint stayed the same all the time and it works on the older version of the project from 4.15.

The vector is resulting from the substraction of the finger position(screen x and y are values taken from input touch location) converted into the world position and the current ship position should add to the old ship position ( multiplied by sensitivity for smooth movement)

I have filtered out the x choordinate because my whole scene is moving along y(traditionall x) and z(traditionally y).
Therefore typical 2d vector calculations.

After investigions I found out:
The ship position is correct in the world. It#s the same as before, same height as camera z value
If I touch the screen directly on the ship, it should logically give after conversion and filtering the same location result as the ship, exept-It does not!!!

I am literally under pressure now and need to find a solution as fast as possible.
I am maybe asking many questions, but that’s why we are here?

I am very, very thankful in advance for any solution.

Update: Because of some reason “Convert Mouse to World Location” works, but does this function also work on mobile phones? For IOS ans Android as well?

Hello,

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Thanks