mine is disappeared since many days. in past it ahd been disappeared but for very short period. there are three possible explanations
1 they are making some changes i,e caips to gcms transfer and it happens when your data is being trasnfered from one system to another
2 there is a chance that your data gets vanished on your bfd (bring forward date)
3 it is nothing and just a temp glitch
however whatever it is there must be soem explanation to it as nothing happens without a reason. either it could be technical and not related to our cases advancement or it could be related to our cases..keeping fingers crossed