Platform icons are not updated on posts page

Describe the bug

When Platform icons are updated, cache is emptied everywhere except on /@handle/posts/guid pages.

Steps to reproduce

1. Go to a comment page
2. update a platform (podcast, social on funding)
3. Go back to the comment page: platforms are not updated
4. Empty cache
5. Go back to the comment page: platforms are updated

Expected behavior

Plateform icons should be updated

Actual behavior

Plateform icons are not updated

Relevant logs and/or screenshots

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Context

• Castopod: beta-8
• OS: Debian 10
• Browser: n/a
• Web server: nginx

Possible fixes

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