Your camera likely has some barrel distortion.
The new version of the app, Version 3.9.8 - available today - has a Distortion feature in Video Settings that may potentially help a little with this.
the distortion feature only exaggerates the problem
@Kaleb @visualmusicdesign This really a very annoying issue that constantly blocks a fast production. As a paid user, pleaseeee consider finding a solution. Thank youuu