Issue in Linkage rules in v2

@hongboji @support

when po is not empty po-attach should be visible and required but the field seem not empty

I have to write something and then delete then it take that field as empty and hide the po attach

shown in video
export-1782395675768-ezgif.com-optimize



Hello, could you please tell me the version number of NocoBase?
Please reproduce this problem in the demo environment.
https://a_8hwne7u84ho.v13.demo.nocobase.com/admin/
(Account: admin@nocobase.com, Password: admin123)