Command help parameter names flash when typing user defined dynamic identifier

The bug

The command help parameter names flash when you type a value for a user defined dynamic identifier, like a scoreboard objective name, entity tag, team name, ... .

See (18w05a) Flashing command help.mp4.

Affected situations

Likely incomplete

• scoreboard objective names
• bossbar id
• entity tag
• datapack id
• score owner names

Not affected

• team names

How to reproduce

Type /trigger and quickly type a random trigger name