Meshinstance dup layers sometimes go ugly?

[madrobot]

Anyone else ever have this issue?
Dup layers sitting fine when other layer is selected, but when you select the dup layer the points suddenly warp out all over the place for no apparent reason? Then return when you select a different layer again?

I don'tknow if it's a by product of layer translation or something, but it's unnerving, and makes working with the dup layers problematic