Traffic learning URL suggestion [HTTP] *.gif / jpg / png since upgrade to 12.1.1

Since we upgraded to version 12.1.1, we have suggestions like these:

    Action: Add URL 
    Matched HTTP URL:    [HTTP] *.gif 

    Action: Add URL 
    Matched HTTP URL:    [HTTP] *.jpg 

    Action: Add URL 
    Matched HTTP URL:    [HTTP] *.png 

If policy is case sensitive it looks like that:

    Action: Add URL 
    Matched HTTP URL:    [HTTP] *.[Gg][Ii][Ff] 

Even though we have URL's which uses wildcard to accept e.g.:

    /url/*.gif 

this suggestions come over and over again. I would expect that at least it would tag a matched wildcard, which is not happening.

I can for sure ignore it... but I would like to understand why it there and why is it good for.

Can anyone explain Cheers St.