auto fraction stack

I just switched from LT 2014 to LT 2015 and there is a change in Autostack I cannot seem to fix. In LT 2014 I would type the following

L31/2x31/2x1/4x11'-31/2"  and the 1/2 & 1/4  would stack and also delete the space between the numbers.

Now with LT2015, I type the same way and end with this  L3 1/2x3 1/2x1/4x11'-31/2" and the only fraction that stacks is the 1/2 on the end.

and I have to use Text Formating to highlight the fraction, right click the mouse button, then choose stack. 

Does anyone have a fix?

Joe

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