VA fails to highlight tooltips when content to show exceeds its maximal bounds:
For example:
/*------------------------------------------------------------------------------------------------------
| NAME: fooBase
| AUTHOR: aaa
| DATE: bbb
------------------------------------------------------------------------------------------------------*/
class fooBase
{
public:
virtual bool fooMethod() { return true; }
virtual ~fooBase() {}
};

However, when I shorten last line of comment it works:
/*------------------------------------------------------------------------------------------------------
| NAME: fooBase
| AUTHOR: aaa
| DATE: bbb
------------------------------------------------*/
class fooBase
{
public:
virtual bool fooMethod() { return true; }
virtual ~fooBase() {}
};

Similar issue is when name of class or of class it is derived from is too long:

Seems that there is any exception that stops overpainting process.