Invisible buildings?

Lately I've been experiencing a recurring problem with CoX.
Every so often, when I log in on a character, I notice that suddenly all the major geometry is missing from the zone. Mostly buildings and other large structures, although the ground and lesser details like chimneys, balconies, fire escapes, etc. are still visible. Once this happens, the only way I've found to fix it is to completely log out and then log back in.

I've been experiencing this problem since back in around I12, but back then it was extremely rare when it happened. Since then I've taken a break from the game, and now that I'm back, this problem shows up frequently. It's really annoying to have to either completely quit the game and log back in, or else run around in a world of invisible buildings.
Has anyone else been experiencing something like this?

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I did see a few reports of it after i13 was released as well. I'm not sure what we decided the problem was. I'm fairly certain a "/reloadgfx" fixed it in most cases... but I could be remembering wrong.

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