Stacking/Unstacking in Develop Module
Before the latest update to Lightroom Classic CC, in the Develop module, I could just click on the stack icon 
to stack or un-stack images in my library. But not anymore. Unless I got to Library module, this feature doesn't work.
How this affects the workflow: when I am processing large no. of photos if I want to stack or unstack, it now takes 3 or 4 more steps to accomplish this simple task. It indeed is a time waster.
Are there settings that I changed inadvertently or is it a bug?