I have a problem with splitting lines in parcel fabric. We have an attribute domain that is set to duplicate in splits. However, the line attribute is null when using the split tool. This only occurs if the lines are in an active record. Outside of the record, the line has the correct attribute. This is in ArcPro 2.9.5, ArcEnterprise 10.9.
I've tried testing at the latest version of the software (Pro 3.1 and Enterprise 11.1) and I am unable to reproduce this behavior. I've created some lines with a domain and tried using split with and without a record and the domain value is preserved in all cases. I did make sure to set my split policy on that domain to Duplicate, like you stated above as well. If you are still having issues you could contact technical support and they could take a look at your data and see if they can diagnose the issue.
