Adding Blank Lines throw StringIndexOutOfBoundsOfException

[frozenMC]

While editing an existing hologram, deleting a line moved the line down so I assumed that adding an blank line will push the position of line 1 back to where it was previously.

The command used was '/hologram edit The_White_Mane-WFP3A insertafter 1 ' and it throws an string index, "begin 0, end -1, length 0".
Expected Behavior: Adding Line 2 which is blank.

Build 51