Sorry, I don’t have time to file a proper bug report right now, so I’m dumping it here in case it interests someone. Found a few minor bugs within the Material Instance editor, 4.23.1:
**1) Material Instance editor’s Search doesn’t search for some symbols in Parameter Groups names. **
I only tested periods and round brackets ("." and “)” symbols), but I’m willing to guess it also applies to most of non-alphanumeric symbols (square brackets, underscores, etc.). The behavior only affects group names. Parameter names that use such symbols appear in the search results.
To quickly test, make an empty material with some parameters (use only alphanumeric names like “param1”), set them to a group called “1.Group”. Make and open an instance. Search for “1.” or “1.Group” (without quotation marks). The search will show no results.
2) Material Instance editor’s “Show Child On Category Match” option doesn’t seem to be working.
(This is way less important and not something I use, so I may be mistaken about the intended functionality here.)
*To quickly test, make an empty material with a parameter called “Param” and set it to a group called “TestGroup”. Make and open an instance. Search for “TestGroup”. Both TestGroup and its Param parameter will show up in the search results regardless of the toggle state of “Show Child On Category Match” (found in the option menu in the upper right corner). *