Looks like DPD did recall the P320 at least temporarily, but not for an actual AD. It also looks like it will shortly be going back on the approved list.

Official Statement :SIG Sauer Reaffirms Safety of the P-320 pistol. - The Firearm BlogThe Firearm Blog

BREAKING: P320 Recall Issued By Dallas Police | Prohibited From Duty Till Repaired - The Firearm BlogThe Firearm Blog