Sharp drop in IPv6 traffic on AMS-IX on January 10th, 2019

Hi all, /u/tambry on Reddit [0] posted about there being a sharp decline in IPv6 traffic on AMS-IX today. A ~60G drop from peak looking at the graphs here: https://stats.ams-ix.net/sflow/ipv6.html Anyone know what happened or any ideas as to what the cause in such a sharp drop might be? [0] - https://www.reddit.com/r/ipv6/comments/emvjyd/sharp_decline_in_ipv6_traffic_... -- Sadiq Saif https://sadiqsaif.com