WAVE issues from post

Running WAVE on Discourse hosted reveals a handful of WCAG accessibility issues.
Posting each in a separate #ux thread.
Hopefully these are repeatable using WAVE on your own instance, but if not I can provide details on any of these items.

results from a test thread:

Guideline Type of Page/Process Found by Notes Level
Linked image missing alt text 2.4.4 Link Purpose (In Context) WAVE Images that are the only thing within a link must have descriptive alternative text.
Empty button 1.1.1 Non-text Content WAVE Bell button
Empty links 2.4.4 Link Purpose (In Context) WAVE post content
Skipped heading level 1.3.1 Info and Relationships WAVE h4 after h1
Redundant alt text 1.1.1 Non-text Content WAVE post content
Redundant title text WAVE post content