As expected, Patch v5.30 brought along it’s fair share of bugs. Among the list of issues is an issue causing sprinting to be cancelled when the player swaps weapons.
The Fortnite Trello Board has been updated to indicate Epic’s awareness of the issue.
Sprinting is canceled when quickly cycling through weapons while jumping.
This issue can also happen when a player stops any movement input (even while midair) and consistently spams inventory swapping. Upon landing, they will be unable to sprint until the inventory swap spam is done.
Have you experienced this bug? Worry not, Epic is working on a fix as we speak.