Open any GUI always reduce the current render distance. This include:

1. Open chat, emote, and pause
2. Open any User Interface block (furnace, stonecutter, etc)
3. Inventory GUI

How to reproduce:

1. Open Minecraft world
2. Press “Open chat”
3. Notice the render distance were reducing
4. Do the steps 2 again for another test

Observer results:

When open any GUI, render distance always reducing

Expected results:

Render distance should be set correctly when open any GUI

Note:

This bug affects on mobile devices only (PC version sets correctly)