The background opacity of subtitles and chat, are affected by a potion effect UI fading out

The Bug:

The background opacity of subtitles and chat, are affected by a potion effect UI fading out.

Steps to Reproduce:

• Enable subtitles.
• Type a few messages in chat.
• Give yourself an effect for a short amount.

/effect give @s minecraft:regeneration 5 5

→  Notice how sometimes, either the background opacity of subtitle or chat, constantly change.

Information:

This issue occurs regardless of what your "Text Background Opacity" setting is set to.