Duplicate pumping heart disappear

got 2 pumping heart in my bag
then when i arrange the bag
it turns into 1

 

Temporary fix is to drop it and reloot. It stacked into 1 but doesn't show the number.

 

I already throw it into the cash shop trying to fix it,wondering will it not work after I done that.anyway,will try out when I get home.

 

What I mean is to drag and drop it onto the floor and reloot it.

 

Yea I know it,I mean I throw it into the cash store and AFK before I report,I'm worry that it will be unstack after I done that.

 

thanks solved!