Bug with slows seemingly becoming permanent but not displaying any debuff icon.

Been encountering this bug every now and then across multiple characters, and i can't really find any particular lead on what might be causing it other than slows being involved.

I've noticed many times now that my character will just feel quite noticeably slowed, both in skill speed and movement speed, but without showing any debuff icon explaining the slow, and it doesn't matter how long i wait or where i move to, it doesn't go away until i change instances. If i portal out of the map and come back in, my speed returns to normal.

I had another incident i think is related a short time ago with freezing. I opened a strongbox that had a freeze modifier on it. I had a thawing charm with me, with full charges, that should have removed the freeze instantly. And while the charges on my charm were consumed, i was still frozen anyway, and the freeze never went away. I probably lived about 8 seconds or so before the mobs eventually killed me, and the entire time i was unable to move, cast, or do anything, all while there was no debuff icon on me.

I'm guessing something about changes to action speed is not being processed properly sometimes when debuffs are removed, causing the debuff itself to be gone but the slowing/stopping effect to remain indefinitely.