Remote tag provider maximum update rate

I’ve got two gateways - A and B. B provides A with some tags as a remote tag provider.

For testing, I’ve set up an identical provider on both gateways. I’ve created a 100ms direct update tag group on both and both have one tag pointing to the same device in this group.

I then added both tags (one local provider and one remote via gateway B) to a screen on gateway A to monitor them. The result is that the local tag provider updates at the 100ms rate as expected but the remote provider is updating at a 1 second interval.

I opened the designer for gateway B and there I can see that the tag is updating at the 100ms rate also.

So it appears that there is a 1s maximum update rate for remote tag providers? Is this correct, or is there a setting somewhere I need to adjust?