What causes boots to blowout on the side of heel like this and how can it be corrected so this doesn’t continue to happen . I’m not 100% sure if it’s always the left boot .

10 30

16 30

13 10

26 35

14 10

9 10

11 10

33 32

17 0

30 30

10 30

20 33

28 33

30 35

10 10

4 0