Custom Data Entities not visible in UDE after deployment

 I experienced the same problem as explained here https://community.dynamics.com/forums/thread/details/?threadid=1b8af6ce-8502-f111-8406-7c1e525b1dbf

After some check it turned out that my new custom data entities have been added with label references instead of their actual text values (in English). This seems to be the culprit. 

I cannot see my DEs in the list after refreshing it. And even when I added them manually no fields mappings were generated.

Once I manually changes their values in ENTITYNAME, they appeared after refreshing and I was able to generate field mappings.

So, if you have similar issues, connect to your UDE SQL DB, check the names.

SELECT DE.* FROM dbo.DMFENTITY AS DE

WHERE de.targetentity like 'YourCustomTableEntity'

And fix it by a simple command.

update DMFENTITY
set entityname = 'My custom table entity'
WHERE targetentity like 'YourCustomTableEntity'