Text displays with the "shadow" tag enabled and the "see_through" tag disabled exhibit z-plane fighting at a close distance

The bug

Enabling the shadow tag on a text display causes z-plane fighting when observed from various distances, resulting in artifacting, unless the see_through tag is also enabled.

This issue has been present ever since 23w06a when display entities were added, but it could only be observed from far distances. As of 25w15a, the issue now also occurs at close distances (about five blocks).

Steps to reproduce

1. Run the following command to summon a text display without the shadow tag:

   summon text_display ~ ~ ~ {text:text}

2. Run the following command to summon a text display with the shadow tag enabled:

   summon text_display ~ ~ ~ {text:text,shadow:1b}

3. Observe both text displays from various distances to see z-plane fighting on the text display with the shadow tag enabled.