AdHoc Trend tag tree click blank

AdHoc Trend template ,I use it in Ignition 8.1.2 ,normal.
I update version to Ignition 8.1.20,when I click on the tree, it will become blank.
How to resolve it ?

Known bug, not yet fixed:

You should open a support ticket so IA knows this is important to you.

Version 8.1.19 , Tree View add property Selection Fill Color.
DOC: Vision - Tree View - Ignition User Manual 8.1 - Ignition Documentation