My lab map disintegrated in January 2004. Why do lab maps disappear?
The lab map disappearance is a glitch. It should not disappear as you should be able to keep these lab maps forever. The only known time completed lab maps have started to disappear was during the end of 2003 and the beginning of 2004. Since then, there haven’t been many reported cases of this glitch surfacing.
How did this glitch occur?
Apparently every account with lap map access has a flag to their account which signifies so. Somehow, this flag was switched with the flag for old battledome abilities.