Hi PenrosePrince,
Was this a function you created in a project started in UE4.12 that you’ve updated to UE4.13? If so, do you still have the original copy in 4.12?
If you do not have a copy saved in the original version, you can isolate the issue by running a map check on all maps and seeing if there a problem is flagged in a particular blueprint. Examine the blueprint where you created the drag-select function for errors/warnings and correct any if present.
If none of these resolve the issue, please provide repro steps so we can test for a bug on our end. In order to do so, we will need to know how you have set up the drag-select function so please either describe this in detail, using screen shots if possible. Or you can simply send a link to your zipped project from Dropbox or Google drive, etc to me in a private message on our .
Thanks,
.