Just for info the build 281.1 has been released as beta version (release candidate actually).
Links and change log in the Product Owner's Lounge.
Be careful even if it's a release candidate, make backup copies of your MFA files before loading them, just in case there is a problem.
If no specific issue this build will be officially published tomorrow.
The main issue that was fixed is the scrolling issue in the iOS exporter, so please iOS users test iOS apps so that we know if it's definitely fixed, thanks!