Maintaining character dimensions

MGMOZ

I haven't found a pattern to it so far, but occasionally, after I have created a scene in which two characters interact in some way ( foreheads together, arm over shoulder etc.), I save the files as per usual and close the program.

Then, when I next open this same file, one of the characters has somehow changed dimensions and no longer line up with the other character. They maintain their pose but not their size.

Has anyone else had this issue?