Strange Weldment Cut List Problem

I have a multibody part file named 437514.SLDPRT. When I right click any cut list item in the feature tree and select ‘Properties’, in the Cut list summary, the Value/Text Expression for most of the properties are wrong. It looks like this:
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If I click on any other cut list item in the list on the left and then click back on the original, it shows the correct information:


I don’t use cut lists every day, so some of the inner workings are still a bit mysterious to me. Does anyone recall this as being a bug? We’re still using SW2017 SP5 (going to upgrade any day now, I swear).

The only reason I even noticed this is because I was trying to manually tweak a material description of a single item in the cut list. This item is made from explosion clad plate. I wanted to add some text to the normal material description to include the cladding, without having to add a new material to the database. So, the normal material description is this:

SA 387 GR 11 CLASSS 2

and I want it to be:

SA 387 GR 11 CLASSS 2 WITH SA240-410S CLADDING

In normal custom properties of parts I do this all the time, by just appending the text in the custom properties dialog. In the cut list, any attempt to add text to the Value/Text Expression column of the MATERIAL row is instantly deleted. I can seemingly add it in the Properties Summary tab:


but it doesn’t affect the cut list and the added text is gone when I go back into the Properties Summary.

Is creating yet another material in the database the only way to make this work?

is the wrong name, the name of the part that was used as a “reference” for the save-as of the new part? If so, I’ve had this happen to me. Reported it in 2019, our VAR had provided a program to fix the issue and the suggestion was to have this checked:
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In our case, we weren’t sure if SolidWorks or CustomTools was the culprit.