Before reading, this is NOT a duplicate of any other javaadoc related Android application that does not work, in my case I can see it, but only in the source, which means that I can not check javadoc without going to the class. This is also strange, because it seems that this happens only with some classes, but those with which it works are in very small numbers. To make it clear, here are a few screenshots.
Firstly, when it does not work: 
Then when it works:
Any ideas? Please help. Thanks!
Chaoz source share