Certain constituent records are displaying as blank lines in quick find or open a constituent search windows. This does not happen for all constituents but happens for several and keeps happening for additional constituents as time goes on. If you save and close the constituent it then displays properly in the search window.
We are currently evaluating this issue and will update this article when we have more information.
Steps to Duplicate
Search for a constituent via quick find or open a constituent
Rather than seeing their information they display as a blank line item
If you double click on the blank line item it does pull up their constituent record
If you save and close the constituent record it now displays properly