These needed to be pointers as the map may have data added to it while we have a reference to an element within it.
#jira UE-74604
[FYI] Francis.Hurteau
#rb none
#rnx
#ROBOMERGE-OWNER: ben.marsh
#ROBOMERGE-AUTHOR: jamie.dale
#ROBOMERGE-SOURCE: CL 7064703 in //UE4/Release-4.23/... via CL 7064706
#ROBOMERGE-BOT: BUILD (Main -> Dev-Build) (v367-6836689)
[CL 7124419 by jamie dale in Dev-Build branch]
3b0f3358cd