Fetching encoding table seems VERY SLOOW

I have 20Mb line, no problems, full speed on it, but before updating, fetching encoding table, done like 22MB in 5 min, i have 3500/3300 MB/s on SSD disk, but what is reason for this? Never been like this before.

zhttps://eu.forums.blizzard.com/en/wow/t/mac-issues-crashing-lagging-and-stuttering-after-83/119195 48h without news or answer.
TOP prio for your compagnie. Time to assume. We are paying.