I'm not sure if this is a bug or the field settings need changing, but when trying to the use the entries option and linking to multi-site content from another site, you can select the content and save an entry but the link it field is blank after reloading.
The test case used was:
Linkit field in matrix block using the entry option
I'm not sure if this is a bug or the field settings need changing, but when trying to the use the entries option and linking to multi-site content from another site, you can select the content and save an entry but the link it field is blank after reloading.
The test case used was: