Using the ItemSwapper mod by tr7zw.
When you enable "show screen title" and than use the Itemswapper mod to swap an item it blurs the background but doesnt show the class name.

Hey I noticed this issue was still open. I was able to find the specific screen for the mod inside the logs.
The line that came up for me was listed as "dev.tr7zw.itemswapper.overlay.SwitchItemOverlay"
Hope this helps!