When using enhanced block entities with sodium 0.3.x but without indium, Chests and shulker boxes will have a duplicated block which might be obvious to tell.

However with indium regardless, visual artifacts can be noticed when viewing the entities very closely but duplication is resolved from that.

A chest without indium mod present:

A shulker box with a transparent line present regardless of having indium or not:

and finally; Cancelling the chest animation causes it to flicker on specific frames which is absent in vanilla.

Sodium 0.4 with Indium installed:

Yes I am having he same problem. The chest flickers when you close it.