Thank you! Sadly no, it’s not a distance issue. I use llRegionSay on the object that sends the open/close messages, and can see that the all blinds close as intended. The issue is, if I move away the east facing one so I can’t see it for a while (I turn the other way and go into a room where the blind is out of view) then sometimes when the blind is back in view, it’s re-drawn as being in the default open state. If I relog, it’s actually still closed as intended. For others that keep the blind in camera view, it’s always closed as intended, so it is as if there is a caching issue/glitch with the prim. I’ll have a look through the Firestorm bug tracker as well just in case...