This issue has been closed as 'Won't Fix' due to an extended period of time without updates. If this issue is important to you please let us know by posting on the AnswerHub or UDN, and Epic will re-open the ticket for further review.
Using the Reset To Default option for any of the transform values as well as the Paste command for the Scale values on an actor can still change the values when an actor's "Lock Actor Movement" setting is enabled.
This also occurred in 4.13
Head over to the existing Questions & Answers thread and let us know what's up.