When I look back at your sterilization notes I see that you may think that aluminum foil over the top of your vessels is unnecessary.
You should use the aluminum foil on the tops of the vessels. The reason is for moisture regulation. Pressure cooking can introduce moisture into your mix (at least, more than you intended). In this hobby, grams of water make a difference.
Perhaps what could be going on with your latest transfers is that (to me) it looks like that sawdust could be overly wet. This will create a situation which is difficult to colonize. Your spawn may be a bit reluctant.
Also, some of your jars seem a bit full - leaving little room for shaking.
Just some thoughts.
Hoping this helps.