Certain tiles have become impassable at what seems random. Found several near the Cadomyr Marketplace depot so far, as well as one on the path from Cadomyr gates to the Malachin temple.
Tested it with another player who also found the tiles to be impassable. Slightly also says he did not make those tiles impassable. Slightly also says his GM char can pass those tiles. After Slightlys Gm character moved across those tiles, however, they suddenly became passable.
Also had some other issues start happening around the same time as this one appeared, but so far only I've experienced them as far as I know:
People standing still having the mid-run animation instead of the regular one.
As well as stuff people say or emote, be it me or someone else, being sent/shown twice, but only on my client not others.