Teleport tether not working on collector flower

[commandantjones]

Sounds silly, but it seems like I'm seeing a teleport tether work on machines, but have no effect on a group of collector flowers in SMP.

I was seeing it not work on the collectors, so to test it, I moved to a different chunk, set the tether next to a macerator, stuck a stack of coal in, and warped to spawn for 10 minutes. When I came back, the coal had macerated. When I do the same with the collectors, I come back to no change.

Is that supposed to be possible?