This is bull****. Share your codeplug and I will explain you where you're failed.
This is NOT an option. This is mandatory setting for ANY professional DMR radio. This is part of standard - there is no any wildcard for GID. So, you have to specify one or more if you need to receive Group calls. You MUST specify it.
This is very very very known situation tested many times. Now all looks like you're don't know how to program radio properly. I bet that you have RX group list on channel. I can bet even for XPR radio.
Of course as was stated above, if you're not using the same RID.
You sir are completely wrong.