Support for relationships between sites?

Support for relationships between sites?

I have set up a multi-site account (5 sites) with switches and other assets at each site.   MSP is not letting me add a relationship between switches if they are in different sites.   I got around the problem by temporarily putting all the switches in the same site, creating the relationships, and move them back to the appropriate sites.  The relationships DO stay, however this is a time wasting effort.  Is there something I am missing or is this a bug?

Thanks.

edit:  We are on 8.3 Build 8308
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