Continuous Cloud

If your sandbox received the August Portfolios release between Friday, August 8 at 2:00 a.m. UTC and Monday, August 11 at 9:30 p.m. UTC, a targeted patch will be applied on Wednesday, August 13 between 3:00 p.m. and 6:00 p.m. UTC. Sandbox environments will be unavailable for approximately 20-30 minutes during this window.

This patch will not affect production deployments, and there are no delays expected.
If your sandbox received the August release after Monday, August 11 at 9:30 p.m. UTC, you can safely ignore this notice.