It’s a bit unusual to call a sync hold with that many regressions, but I know that all of them are caused by just two packages: moveit_resources and jsk_3rdparty. I have revert PRs opened for both of them: https://github.com/ros/rosdistro/pull/26216 and https://github.com/ros/rosdistro/pull/26237 . However, both maintainers are planning on doing new releases to fix those packages (thanks @k-okada and @rhaschke) .
With all of that being said, I plan to start holding releases today, August 19th, aiming for a sync at the end of the week. The only exception will be fixes for the above issues.
Please comment here if there are any other outstanding issues I should know about before performing the sync.