Many of our naming instructions mention having Optional_Info at the end of the file name. As the label suggests, it’s optional, but many people like to use it for things such as an episode title. Such optional info is ignored by Plex when matching content with legacy agents, but it is used in the Plex TV Series agent to give a hint for matching. If you want info to be ignored put the optional info in brackets. e.g. /Band of Brothers (2001) - s01e01 - Currahee [1080p Bluray].mkv
I do edit the names to make them match, which works fine. However, I always forget that it’s an issue when multi part movies pop up, because it’s inconsistent with Plex’s Movie and TV naming conventions.
I have not had a single issue related to using square brackets in my file names in years.