Record Selector fields empty (bug?)

I created Modules with Record Selector fields. It all worked for quite some time but now although the modules are linked the correct way (everythin is working fine) their values are not displayedin the Corteza UI, as you can see here:

Clicking on the Edit Icon the correct linked Record is preselected, so under the hood it is working fine I guess:

Did anyone experience the same UI bug and knows how to fix it?

Can you please specify the version youโ€™re using?
I have not seen this before.
Any custom configurations you have that are worth noting?
Can you check the field configuration for those two fields.