Loading screen refreshes when the game starts generating a world, causing screen animations to play again

While the game starting generating the world, for some reason the current loading screen will close and then instantly open a new one, causing the screen animations play again, this has been an issue since 1.14 (Buzzy Bees update)

Steps to reproduce:

1. Download and apply attached resourcepack, which add an fade in/out and offset in/out screen animations to the loading screen

2. Enter any world, and wait until the game start to generate the world (when the progress bar start to fill up)

Expected results:
Screen animations doesn't play again.

Observed results:
Screen animations play again.

Note:
This can be reproduced without using the attached resourcepack, as you can see that the animated “loading…” text will reset to it’s default state when the world start generating, it just very noticeable while using the resourcepack.

If tested without using the attached resourcepack, one of these will occurs:

• The screen will become blank for about 0.05 seconds when the game starting generate the world.

• The newly opened loading screen overlap with the old one, causing the loading tips to be overlapped with a new one and the transparent dark background inside loading tips window to become slightly opaque for 0.05 seconds.