Lawmakers are pushing defense officials to release plans ensuring that National Guard and reserve troops aren’t being shortchanged on specialty pay, saying the unresolved issue could undermine recruiting and retention for the force in the future.

In a letter to Defense Secretary Lloyd Austin on Tuesday, a bipartisan group of congress members led by Sen. Tammy Duckworth, D-Ill., and Rep. Tim Ryan, D-Ohio, noted that the information was due Sept. 30, per instructions approved by Congress last year. But to date, the report has still not been delivered to Capitol Hill.