Thing I noticed to avoid losing progress with the current glitch
When you boot up the game, in the main menu look in the upper right hand corner if it just shows 3 dots hit start, it will than show your level and your level title, normally in your level title it has some sort of cool name, for example
Worlds greatest hero
( not a actual title using a made up one for a example)
If there are no words and just a white circle that’s spinning over and over again, close the game
Also if you ever boot up the game and it is showing your level and info correctly. hit start just in case and make sure it stays that way when going back to the main screen and it doesn’t switch to three dots, if it does switch to three dots close the game
Going into a big loading screen like clicking arcade, story or going into online matches basically causes the game to panic and it just picks a level at random or resets you completely
Basically every time you boot up the game make sure to click start and do that check
At most I’ve only had to close the game twice to fix it, the glitch doesn’t happen that often, with the game not showing my info correctly only twice in one week. of course that fact doesn’t matter if you don’t notice it and all it takes is one time to lose everything. It’s a major issue that needs to be fixed
This fix might not be 100% percent accurate admittedly, but it has currently stopped me from losing any progress while doing the process since release
Injustice 2 had this exact same glitch at launch back in the day when it came to losing progress and funny enough this was the same process you had to do for that game too
Hope this helps