There have been no changes in my connection - see the IPv4 and IPv6 BQMs in my signature. I'm on Zen backhaul on an exchange where the single thread speed issue has been resolved.
I do see occasional changes in latency, which are presumably down to temporary changes in the backhaul network topology, but nothing as ugly as in your BQM. With that level of dropped packets, I'd report a fault - it may be that a link failure has forced your traffic onto an overloaded route.
It's also worth checking the Zen status page
to see if there is anything relevant there.