Steemit Mystery - I have a Pending Payout, but 0 Upvotes!

I have noticed something peculiar in the comments section of my Steemit blog lately.

I have pending payouts on some of the comments I wrote, but the comment has received 0 upvotes.

The following are two examples:

I want to hear from you:

1. Has anyone else seen this?
2. Does anyone know why it is happening?

Thanks!
@SumatraNate