Josue Boix Pozuelo

Hello,

I have the same issue that Martine Hirth is describing, but unfortunately the solution from Viachaslau doesn't work for me.

In my case, “booking_id” is a variable that may be set or not. 

When it's not defined, this condition always goes to the wrong side of the tree.

If I print the value afterwards,

I get the following message:

The current value of booking_id is "".

How can this be possible?