Ben–
It is a technique/mechanics issue.
Can you have someone look at your technique for the skill you are performing?
Until the cause is addressed it will continue to occur.
These may be the episodes you are using.
Banish Your Elbow Bench, Dip, Pull Up Pain, You Don’t Really Play Golf or Tennis Do You?
Episode 273: Lateral Elbow Pain/”Tennis Elbow”, “Kimura Elbow”