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 .

42 43

17 40

62 48

50 44

35 45

70 46

25 42

27 12

51 22

38 45

232 41

44 46

21 12

33 43

30 40

46 40