Message ID is not highlighted in channel to see details

Hi Experts,

In channel logs the it shows the messages are processed but those are not highlighted as shown in first screen shot but for successfully running interface it should be highlighted as shown in second screen shot below.

But the message ID are highlighted as shown below.

Since this is a sender channel do you think the incoming payload do not match with data structure as that of existing defined in PI? or what all might be the reasons for it?

Thanks,

Ramu G.