Searched a bit for a similar question - no luck.

For the last few flights I've taken TSA Pre has not printed on my boarding pass when using a printer and paper. Strangely, when I check in on my mobile OR view my boarding pass on my mobile after checking in online, TSA Pre magically appears.

The only reason I bother with the paper at all is the HOOU coupons in the case an upgrade doesn't clear.

Anyone else seen this?