I have the same problem for 2 weeks or so. Sometimes requiring 10 or more attempts to log in!
In order to log 3 chars in each PC, sometimes it takes me close to 1h, that associated with random disconnects, its very frustrating.
Issue persists in 2 different computers, running complete different specs.
1st computer: i7 7700k, rtx 2060, 16gb ram, 2k monitor
2nd computer: i5 9400, gtx 1650, 16gb ram, 1080p monitor