EXACTLY the same issue with Nanami, except Foal Play was not involved. One baby, same card, got to the end and shot up to hyper-sized and then crashed.
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ERROR in action number 1
of Other Event: User Defined 1 for object control_preg:
index out of bounds request 45 maximum size is 45############################################################################################
gml_Script_sc_board_cont (line 171)
gml_Object_control_preg_Other_11 (line 39)
gml_Object_world_Step_0 (line 14)