Hi ,
I wasn’t able to reproduce this in 4.8.2. Does this only occur in your current project, or can you reproduce it in a new project as well? Does it occur when searching for any actor, only only specific actors/misspellings?
Please copy information in Crash Reporter window next time this crash occurs, make sure you submit it, and paste it in a reply here (including Machine ID so we can look it up). Then and attach log from project’s Saved\Logs folder. Thank you!