Data Analytics 9.6
In Discovery Services, after "LOAD MIB" as shown below, the new record is added, but when the node is collapsed or refreshed, the record will be missing.
As for this specific action, the changes need to be manually saved right after loading the MIB file before navigating elsewhere.
Solution / Workaround:
Right-click on "Mibs" node again, and click on the "Save Changes" option.