Die Roll rule question

Howdy!

I have this set of dice rules set up in my Star Trek Adventures game. For some reason, the highlighted line is causing the entire ruleset to "fail" (no icons, display only roll and totals). If I have d6 rolls in any of the posts in the game, then they lose any -, 💥 or ✅ that may have already been there...

I'm trying to get a display of the number of d20's that were rolled under the given TN in the reason. (each roll under the value is a success)

{
"diceRules": [
{"rolled": "d20","reason": "TN ##","countTotal": "<=##","hideTotal":true,"content":"✅"},
{"rolled": "d20","natural":20,"content":"COMPLICATION","highlight":"fail invert bold"},
{"rolled":"d6","natural":1,"reason": "[CD]", "content":"💥","hideTotal":true},
{"rolled":"d6","natural":2,"reason": "[CD]", "content":"💥💥","hideTotal":true},
{"rolled":"d6","natural":3,"reason": "[CD]", "content":"-","hideTotal":true},
{"rolled":"d6","natural":4,"reason": "[CD]", "content":"-","hideTotal":true},
{"rolled":"d6","natural":5,"reason": "[CD]", "content":"💥✅","hideTotal":true},
{"rolled":"d6","natural":6,"reason": "[CD]", "content":"💥✅","hideTotal":true}
]
}

Any thoughts on what might be going on??