The map bug makes it impossible to play the game normally

Hello, I'm sure you must have received emails about this issue. After opening the map, it gets covered by fog. By using the tab function to switch, you can revive the maps you've already played, including the fortresses. I was also tempted to keep farming the fortresses infinitely, but I won't let my game account suffer any losses. However, this has seriously affected my map farming. After finishing each map, there's a high probability that it will be covered by fog again, which makes it impossible for me to play normally. And many, many people are already doing this to farm the fortresses. Are you really not going to fix this bug? Look at the ticket prices, the economic system has already collapsed!! Well, I've vented my frustration. Happy Easter.