Form success and error messages with half cache strategy

[insight-media]

I have a form with error and success messages like this:

{{ form:contact }}

        {{ if success }}
            ...
        {{ /if }}

        {{ if errors }}
            ...
        {{ /if }}
        
        ...
            
{{ /form:contact }}

I'm using the half cache strategy, but the contact URL is excluded in config/statamic/static_caching.php

'exclude' => [ "/contact", ]

For some reason, the error and success messages are not being displayed.
I've also tried wrapping them with the {nocache} tags, but that doesn't work either...

[jasonvarga]

Does it work with static caching disabled?

[insight-media]

With static caching disabled it works, yes.

[stefankempf]

I get the same issue. Disabled static caching, the success is showing. With half measure on, it isn't. Even if I wrap only the success tag or the whole form with a nocache tag.

[duncanmcclean]

There seems to be an open bug report for this issue: #7628