Thanks for reaching out! We receive occasional reports that some of our puzzles have a looser fit. To be transparent, we have noticed this ourselves (when we go to pull replacement pieces). Luckily the majority of our puzzles have a tight fit, which makes it far easier for us to pull pieces. We aren't sure why some are looser, but we assume it might be a result of the die cut machine not cutting as tightly for particular puzzles.
Our puzzle sales went up 750% when the pandemic hit, and haven't slowed down. They have kept our business thriving during these challenging times. Lots of things have changed, but our commitment to producing high quality puzzles has not. We hope that you will bear with us as we evolve and fine tune our processes.