Music no longer in playlist?

[Brandon31693]

I am not sure what has been happening here but for the past month certain songs have been skipping. For a split second i can see the song title then it skips as if to say it is no longer available? I tried searching that song and it seems like spotify removed it? I can't understand the reasoning for this? Certain songs however do show back up in search and i have to add them once again to the playlist.. So annoying? Is this a possible fix within the next update that can be implemented? Looking for some logic behind this!