I'm not sure where to report suggestions or problematic behaviors to the Mastodon development team.
This one is an intentional behavior, not a bug.
To help those who use screen readers, we are suggesting to newcomers that they use #CamelCase on hashtags so that screen readers read the text correctly. However, Mastodon's post compose window often changes camel case hashtags to all lower case. It seems to do this if the hashtag is a popular one.
It might be good to leave hashtags alone, as written by the user, instead of overriding with what Mastodon thinks the user meant to type.
@shuttersparks What user interface are you using? The website page or a phone app?
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@EricFielding Sorry for the delay in responding. I'm using the web interface.
