Route Domains HA & Traffic Groups

Running Big-IP 17.5 on a pair of r4600's.

On a pair of tenants, we're running a parent-child route domain setup.  We're doing this not for IP overlap but for routing purposes.

The virtual server addresses are in the default route domain which is the parent route domain.  This is basically the "outside" vlan.  The HA-Sync vlan is also here.

Pool member are in the new child route domain, RD1.  This is basically the "inside" vlan.

All Self IPs for both route domains are in the same traffic groups (traffic-group-1 & traffic-group-local-only).

Questions:

1. HA:  If we use the HA-Sync vlan and the self IP for the "inside" vlan, will we have any issue even though they exist in different route domains?  Should I move the HA-Sync vlan to RD1?
2. Traffic Groups:  Is there an issue with all the self IPs from both route domains being in the same traffic groups?

Thanks in advanced.