Hi Alexander,
I think I’ve encountered a bug in the newest DFFS version.
vLookup refresh on Field change using a custom function seems to not work in the display form. In the edit and new form it works perfectly.
I then chose to “downgrade” to the October 2017 Version and vLookup in the new form started to work like a charm.
Just wanted to let you know about this.
BR,
Chris