I had a few packs, including every trade pack from Arcum, Solis, and Villanelle, as well as some larders that were in completed status and still have some aging all sitting around on some land.

All of the packs I had on the ground previous to the patch did NOT receive timers.

These turned in for their original values, seemingly unaffected by freshness... even if you pick them up and put them down again (they 6 day timer still reset).

Any pack I created after the patch did include the freshness timer. This included aged packs that came from larders that were ready to be picked when the PTS came up. The timer started counting the moment the packs were created either at the work bench, or converting the larder to aged pack.