Constant unexpected disconnections + server rollback

I can play for hours without encountering this issue, and then the game starts disconnecting constantly without a reason (no high ping) for another few hours. After reconnecting, the server rolls back, and my progress from the last few minutes is wiped. This has been happening since Monday or Tuesday.
Image: https://imgur.com/a/44dyttG

Here's what I found: I am able to replicate the disconnect issue by using Maul and then opening Stash or by starting a conversation with any NPC.
Video: https://streamable.com/qookcj