Root motion can accumulate in some cases and then apply a huge force when it ends.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-54238 in the post.
|Component||UE - Gameplay - Player Movement|
|Affects Versions||4.17, 4.18|
|Created||Jan 19, 2018|
|Resolved||Aug 18, 2021|
|Updated||Aug 18, 2021|