I just used A24 for the 2nd time at 63-65 degrees and it worked great. I did a west coast IPA with it and I had it stop at 1.023 from 1.066...however the pouch was about 7 months old so I'm sure that's a factor in it.
I just had a similar experience. I made a starter, but intentionally pitched low cell counts. Though A24 is supposed to avoid the false positive that straight A20 may provide, I found that ferm was done and stopped at 1.022 (from 1.062). I increased my ferm temp to 75, roused the keg, and things restarted, albeit VERY slowly. i would get a bubble from the blowoff every 1-4 seconds, and after another 4 days i am down to 1.020. I decided to "call it" and soft crashed yesterday morning to 58. Since I will dry hop tonight with a good 4 oz, I am expecting some minor creep/continued ferm hoping for a few more points.