When utilizing the Wait for Process Window Action from the Utililty - Environment Object, if the Window Title (an input parameter) you want the Action to wait for contains square brackets... [ or ]... do NOT use those characters in the input parameter. The Wait for Process Window Action has an output parameter of Found (a true/false flag). If the Action encounters a window having the brackets-containing title, the Action will return a value Found of False, even if the literal value of the actual Window Title matches the value of your input parameter character for character.
Instead, substitute the wildcard asterisk character... * ... for either the [ or ] character.
Example,
If the literal value of the Window Title is Lorem - [Ipsum], enter the Window Title input parameter to be "Lorem - *Ipsum*" and the Action will find the window you seek.
In the comments, please advise if you know of any other characters that cause, erroneously, this Action to return a Found = False.