I have a paid for skin pack for Minecraft Bedrock on my Nintendo Switch which was working fine till today when the 1.6 update dropped. For some reason the system never remembered my skin choice for this, I had to set it every time I loaded the game, which is something I never minded doing. But now when I try to set the skin to the one I like (or any from this pack) I get either the default Steve skin or the default Alex skin. The skin pack is the Mobs pack by Pixel2. 

Update: Just checked this on Win10 edition and it works fine. This issue is effecting 1.6 Bedrock on Switch and Android.