CATIA FindNumber prerequsites

Dear Comunity,
We have implemented a findnumber EKL script for a customer and it works fine until last update R2026xGA on cloud.
Within the update of R2026xFD01 on 07th February 2026 customer can run the script without issue at all structures were findnumber was set before. unfortunatelly for new structures the script run but no findnumber is set at instances.
On the other hand, It is impossible to add the attribute CAD extention for exposing instance information > find number to web app Product Explorer.

Update:
the find number script works as expected for existing structures were find numbers were set before. itself if new instances are insert.
Only for new structures the attribute extention "CAD extention for exposing instance information" > Find Number is not created.

Are there any pre-requsites, special settings or Cloud configuration?
Existing licenses on customer side are: PCS, IFW, MDG, MES

Thank you
Thomas Degen (TECHNIA)