Columns

Just thought I’d add to this. I spoke to the developer of Admin Columns Pro and here are his thoughts:

I was able to create the same environment and reproduce the issue, and I found that the conflict is caused by JS in the CPT-onomies plugin file: /assets/js/admin-edit.min.js

In our plugin we use Ajax to get a row with the same columns as we would normally should get while it looks that CPT-onomies plugin expect that the default columns are used. I can join your discussion with their developer if that helps.