ACC MSO Conditional Images Not Uploaded (Long-standing Bug)

ACC has a long-standing bug where images inside MSO conditionals are not detected during content upload. The parser appears to treat the conditional comment wrapper as a standard HTML comment, causing any <img> tags within to be skipped entirely during asset discovery.

Affected pattern:

html

<!--[if mso | ie]>
  <img src="https://images.emlcdn.net/cdn/..." width="640" ...>
<![endif]-->

This becomes particularly painful when a template uses MSO image fallbacks for animated media (GIFs/video posters)  potentially dozens of images that all require manual intervention each deployment cycle.

Current workaround (unacceptable at scale): Strip the conditional comment wrappers → upload → re-wrap. Completely counterproductive for templates with multiple fallback images.