Why aren't all my prefixed product tags displaying correctly?

Technical Q&A
1

Hello.

I am trying to show a list of product tags with prefix “use-” on the top page as below.

But it doesn’t show all the tags and weirdly shows different set/type of them each day.

Could you help me solve this problem?

{% assign tag_list = "" %}

{% for product in collections.all.products %}
	{% for tag in product.tags %}
		{% if tag contains 'use-' %}
		{% assign tag_list = tag_list |  append: "," | append: tag %}
 		{% endif %}
	{% endfor %}
{% endfor %}

{% assign tag_list = tag_list | remove_first: "," %}
{% assign tag_array = tag_list | split: "," | uniq %}

## 
      {{section.settings.title}}

	{% for tag in tag_array %}
		- #{{ tag | replace:'use-','' }}
	{% endfor %}