I may be encountering a related issue.

The frame to select and optional reagent in old world profession is no longer being displayed for me.
this occurred while leveling TBC enchanting. I was able to select the item for several crafts and then the frame just vanished.

Troubleshooting steps taken:
-Uninstalled and Re-installed CraftSim
-Removed Stored variables for the addon using the CurseForge "Delete Settings" Feature
-Disabled all addons except CraftSim to see if other addons were causing a conflict.

I am happy to assist with debugging this or submitting a new bug report if this issue is unrelated.
.yssupykcits on discord