Sacred Undead cannot receive Blessings Bug

[NTJedi]

Endoperez said:
Are they blessed with normal Blessing? It might be just another version of undead "unholy" units requireing a slightly different blessing spell.

From the test battles even the normal blessing spells are not blessing these units even when they are the only sacred units on the battlefield. I see the units do have the sacred status yet a normal priest or normal prophet isn't able to use the blessing or divine blessing spell for them.

I wonder if other undead sacred units also experience this issue.