ToolbarController::preRenderGetRenderedSubtrees() deletes parent's cacheability.

If ✨ Abstract RenderCache into a separate service that is capable of cache redirects in a non-render array-specific way Fixed causes test failures without this, then that might be enough for test coverage.

Re #13: As #2 indicates, that seems to be the case.

Let's see what @alexpott thinks four years later.

Per #15

Sure lets do this. There can't really be any harm.

Committed and pushed 2fe6ae3dd2 to 10.1.x and efc9b3f479 to 10.0.x and 31113fd6d0 to 9.5.x. Thanks!

What an excellent find! 😵

Automatically closed - issue fixed for 2 weeks with no activity.