Characters were deleted after exiting game

While playing on Minecraft for my Kindle, I noticed how right when I opened the game, my skins were all gone, although the character created using the character creator wasn't that bad, the game forgot I had a custom skin created from a third-party skin editor, so my custom skin has disappeared.  Next, I got Minecraft on Switch, normal at first, however the Switch did the same thing as last time, wipes out my skins, replaced with Steve and Alex skins.

Steps to Reproduce:

1. Close out of Minecraft multiple times.
2. While doing that, select profile, if your skins are still there, keep repeating Step 1 until they are all Steve and Alex skins.