OPM CE U9 - Nominal Diameter and Spacers

We have edited modeler.cfg to use differing nominal diameters:

OPM_MATCH_PROPERTY_NOMINAL_DIAMETER = 50;63|65;75|80;90|100;110|125;140|150;160|175;180|200;225|250;280|300;315|350;355|550;560|600;630|593;600|700;710|

This works fine between flanges and valves and instruments, but when we introduce spacers it's a different story.

If a place a Lap Flange first, then try to place the Spacer (630;600) I get the error:

Crazy thing is, if I place the Spacer first, then the Flange I don't get the error??

Next, if I place the Spacer then a Flowmeter I can't get the gaskets to come through. The usual:

If I run a Connectivity test, I get:

These Flowmeters use the Spacers so I need a way around this as the usual config method only seems to work without the Spacers.

Is there something else I'm missing?

Thanks,