No. The block is confirmed and is part of the BTC chain. Ive only noticed this since the cash fork and there have been a few . block 479837 is one check yourself.
If I discovered a bug I'd love some recognition.
But I'm no computer scientist and this could be something normal but I doubt it.
Edit:
So there are more than a few every 10 block aprrox one is mined recently that only has 1 transaction the block reward.
This must be normal then ...
Antpool mined a couple with only the block reward and no transactions .
I'm not at noobie rank for nothing.