shader graph connections of node missing

shader graph connections of node missing in 2021.3.8

actually the connections are exist,result is correct.

help

Try the latest lts.
If that doesn’t help, right click the graph in unity and click reimport

My Shader Graph’s Version is 12.1.7 ,already latest. And ‘click reimport’ doesn’t help also. THX

That’s not the latest, update unity to the latest 2021.3