Q:

Why all blocks at Blockchain are relayed by Unknown now?

only last week I could study which mining pool signed latest blocks.
Today this option turned status to Unknown
https://blockchain.info/
Any idea?
(formatted table)
Height  Age     Transactions    Total Sent  Relayed By  Size (kB)   Weight (kWU)
491728  31 minutes  352     196.23 BTC  Unknown     1,002.67    3,992.19
491727  31 minutes  266     920.01 BTC  Unknown     134.31  515.14
491726  33 minutes  1447    2,900.32 BTC    Unknown     1,017.02    3,996.92
491725  39 minutes  290     822.51 BTC  Unknown     132.29  494.91

A:

Issue seems to be fixed.
Blockchain back in order, blocks relayed by real names of mining pools.
Thank you Blockchain
Height  Age     Transactions    Total Sent  Relayed By  Size (kB)   Weight (kWU)

492019  1 hour 4 minutes    2628    18,615.76 BTC   ViaBTC  1,035.85    3,992.75
492018  1 hour 7 minutes    2662    19,214.10 BTC   BitFury     1,036.1     3,992.5
492017  1 hour 11 minutes   2856    4,369.50 BTC    ViaBTC  1,038.23    3,992.72
492016  1 hour 13 minutes   2815    6,719.06 BTC    AntPool     999.17  3,728.27

