A wired problem. My Ipod shuffle can only play the first few seconds of two particular songs.

There are two songs I bought and downloaded from iTunes, I can play them well on my Mac computer but can only play the first 7 seconds on my Ipod. I am sure that I do sync these two songs to my Ipod because they appeared in my Ipod's play list. In fact the other songs I sync along with these two songs can be played very well. I tried to sync several more times but every time I can't play the full length of these two songs. Any OTHER songs I sync along with CAN be played well. This is really wired... My Ipod is shuffle 4th generation and my iTunes' edition number is 12.2.2.25.

(#8 and #10 songs are the problem, the other songs in the same playlist were sync along with these two but they are fine)