Custom facts on discovery iso

Trying to use the “custom facts” page of the discovery iso process to set some values for the kickstart/provisioning templates, but when using the “fdi.pxfactname1” and “fdi.pxfactvalue1” i can’t change the value. The fact is sent as the same as what the iso was built with. If I don’t build the iso with this customisation and attempt to just put a name and value in the fields, nothing gets sent

Expected outcome:
setting custom facts on the prompt during the discovery iso should set the fact when sending the information to foreman/satellite

Foreman and Proxy versions:

Foreman and Proxy plugin versions:
Foreman-discovery - 21.0.5

Distribution and version:
discovery iso - 4.1.0