Outside of the typical monthly schedule, which brings in the latest Android security patch, Samsung has released new firmware updates for the current flagships Galaxy S7 and Galaxy S7 edge. The timing is extraordinary, but then so is the nature of the updates. Unlike the usual generic release notes that cite unnamed bug fixes and performance improvements, these latest releases address very specific issues. The first one on the list is perhaps the one that's hardest to understand, but the summary is that screen clarity when using Always On Display has been improved. Other things...
Source: http://www.gsmarena.com/samsung_rolls_out_update_for_galaxy_s7_s7_edge_very_specific_bug_fixes_this_time-news-18343.php