I had a few issues a little while ago as well, albeit on a different platform and server. The issue was likely on my end, as we've had a lot of electrical storms about. I reset my modem, my router, and also unplugged the cable to tap it a few times and discharge any static. Fixed the issue. Possibly coincidental, sure, but it could help.
Something I also sometimes do is delete the internal save data. Not sure how that works on PC though. If that fails too, you'll probably want to submit a ticket. =(
I've been having unusual lag for a couple days, both on interactions (crafting stations, containers, etc.) and on skill use. I've noticed it most in Vivec City, but that's also where most of my characters hang out.
This MIGHT just be me, however, since I have a new PC.
Edited by FrancisCrawford on September 5, 2018 7:41PM
Been running diags on my system and all looks fine. tracert and ping path show's no extraneous times, or hops, all looks ok, nothing unusual from me to ZeniMax at 198.20.198.110, 198.20.200.159, 198.20.200.23 and the others that I was connecting to that show as ZeniMax