Bug: Entities with item_ prefix do not cast any dynamic shadows from shadow_control

[MyGamepedia]

Describe the bug

For some reason suit, medkits, ammo, wall chargers, paint power pickup and other entities with item_ prefix don't cast any dynamic shadows from shadow_control. EnableShadow input effects nothing. This doesn't happen with item_item_crate. Also in Portal 2 (you can spawn item_suit and find the issue).
This picture shows prop_physics and item_healthkit.

Issue Map

HL2 levels, Portal mods, any map with these entities.

To Reproduce

1. Open any map that use shadow_control shadows.
2. Enter in the console ent_create item_healthkit.
3. Note that item_healthkit doesn't cast dynamic shadows from shadow_control.

Operating System

Windows 10, should work in any I think.