Play button animated art does not immediately shown upon launch

Since 1.21.120.22 Preview, the Play button in the Main menu now has an animated art featuring the Copper golem, but this art does not immediately shown upon launch, unlike the Marketplace animated art.

Steps to reproduce:

1. Launch Minecraft Preview

2. Look at the Play button, notice the animated art does not immediately shown

3. Now launch the release version of Minecraft (Marketplace button does not have an animated art in Preview)

4. Look at the Marketplace button, the animated art immediately shown

Expected results:
Play button animated art immediately shown, just like Marketplace button.

Observed results:
Play button animated art does not immediately shown.

Note: Its seems like the texture for the Play button animated art does not get cached nor saved in the "textures/ui/" directory like the rest of the UI textures, as launching the game while offline causes the art to never shows on the Play button until you're connected to internet and relaunch the game.