The background opacity of command syntax help is affected when highlighting text

The Bug:

The background opacity of command syntax help is affected when highlighting text.

Steps to Reproduce:

• Type the following into chat without pressing send.

/teleport @a[advancements=

• →  Notice how command syntax help appears.
• Highlight the text.
  →  Notice how the background opacity of the bottom suggestion changes.

Information:

This issue did not occur in 21w08b.