The SQLPS module has been slow to load for years now and has finally been fixed in the April 2016 release. But most of us couldn’t wait a few years and edited the SqlPSPostscript.ps1 file that sits in the module directory.
If you’ve done this on one of the SSMS previews (not SQL 2014 as it’s in a different directory) and then upgraded to the April preview though you’ll be missing something, two things actually, being aliases for the renamed Encode-SqlName and Decode-SqlName, which won’t get put into your modified SqlPSPostScript.ps1 file. And so if you use these your older scripts may break.
There’s an easy fix, though, so all’s well.