Hoppers grab/put items from/into chests that aren't connected

A hopper can now pick items from the other side of a double chest, but it doesn't seem to work as well with trapped double chests.

When you place a chest next to a trapped double chest with a hopper underneath it, in the same way as shown in the added image, the hopper will be able to take items from the normal chest (to which it isn't connected), but is unable to take items from the left side of the trapped double chest (to which it is connected).

This is really annoying.