Release 261 is packed with exciting new updates, including the rollout of a highly requested feature – support for MQTT as a machine data source. We have also made many updates to improve UI and page loading time to support efficient app management, analytics, and shop floor setup.
I guess they are talking about leftover triggers from a long time ago, where the trasitions where not a separate category but regualr actions.
In this era you where able to put multiple actions in one trigger, that are containing a transition.
This is issue prevented for a long time but I guess the old triggers where still supported.
About 3 years ago we made a fairly large change to the way triggers can be built. Before this change, transitions (Go to step, go to app, etc) could be added inline with all other trigger actions. This change has been rolled out to all customers for a number of years, but we are just staring the process of notification that we will be deprecating that old functionality in the future.