Dan, I understood your comment on the subject, but resuming the subject ...
It is displayed without loading an image, it appears that it is not checking as dependencies before playing
That is correct - tickers will show before all image resources are downloaded. The feed might change every time it is loaded and if we did not show it, we might never show it.
If the ticker has been scheduled in advance, and has a reasonable cache period, then the chances of seeing a missing image are low, because it will have been downloaded in advance and then the feed cached.
Even with your answer I think this is a bad logic line. Each ticker when being processed stores in the Bilbioteca all the data. Like any other Layout / Widget, Ticker has dependencies (all ticker items are processed and stored in the player).
I see no reason why TIcker behaves differently than other CMS items.
Please, if I have not understood, do not fight with me, I am only trying to understand why not check dependencies as is done in all other widgets ....