Possible corrupted Graph in database version

I think one of my Graphs is corrupted. In the Graph view when I try to filter by Tags, no tags are shown.

On the Demo graph and any new testing graph I created to test, it works.

I tried the Validate Current Graph command, but it found no errors. Unfortunately it’s the one Graph that I already did some work, and it’s not easy to start again.

How can I fix this?

I am going to answer my own question. After more investigation, I found out that the Property Excluded from Graph view? was set to True. I don’t know if this was my doing (because am still experimenting a lot) or not, but the thing is that I looked to see if this property was set. But in the GUI it wasn’t showing. After a lot of time lost, I decided to reset it to False manually and, voilà, they showed up!