No sensitivity with acrylic temporary cap but cold sensation after putting zirconia cap?

I’m going through dental treatment wherein my 4 teeth spaces ( rightmost corner) are covered wih zirconia crown. Out of the four teeth one was already missing so 3 plus 1 missing space is covered with ziconia cap . My problem is that I had no cold sensation with temporary acrylic cap put on for 15 days but started having sensitivity after putting zirconia cap. Why so.... . Had been using sensodyne n mouthwash as per my dentist.