= phenomenon =
Planet posts that have images inline (using presumably) have these images stripped.

= reason =
Unknown, but could be due to a disallowed code in the input format used for Feed Item. That's just a guess, though.

= recommendation =
Recommend verifying with the Infra/Web team that the Planet already strips potentially harmful material like <script>, and then use a raw input format that doesn't filter any further for these Feed Items.