Tags Change Color in YAML Frontmatter

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What I’m trying to do

I am trying to find the best way to handle ‘tags’ in the YAML header for Obsidian.
Seems there is a lot of weird and conflicting information regarding how tags should be put into an Obsidian YAML header.
Additionally, I am observing a very weird behavior and was hoping for clarification.

Things I have tried

Here is how I am adding tags currently to my YAML header.
Screenshot 2024-01-02 at 08.16.39

Here is how that looks in the ‘Reading Mode’.

My question is, “Why is the last tag brighter than the other tags?” Something is happening here and I’m not sure what it is.
If I add a comma after the tag then it looks like the others.

This is driving me crazy and makes me wonder if I am tagging correctly.

REFERENCE: Other Info On YAML Tags