Are Grav Sites Limited to a Single Form?

When I download the newest Grav admin + default Antimatter theme, enable the Register page for the Login plugin, and also create a "form.md" page of my own (with a form), the Register page's Submit button fails to function. Instead, it just refreshes the page without creating a user as you would expect. If I remove the "form" information from form.md's frontmatter, the Register page properly creates a user.

This is the example form I followed. What am I missing?
https://learn.getgrav.org/forms/forms/example-form

I've found a workaround. It appears that caching was the issue. On the line immediately below

list($forms, $flat_forms) = $this->grav['cache']->fetch($cache_id);

I added $forms = array(); in order to prevent the caching of forms. In hindsight, I'm trying to imagine a scenario in which I would want a cached form post. Are there circumstances where cached form posts would be ideal?

Maybe this would work as well? Then you don't have to hack te code

cache_enable: false

Would this affect only forms? I would think I would want the cache enabled for other pages.

I think you can enable it on the form modular only

See https://learn.getgrav.org/forms/forms/how-to-forms-in-modular-pages

Great! Will this work on register.md as well? My concern is that it will be overwritten by updates to the plugin.

Don't know. Did you test it?

I think the fix is in 1.3.9, but thanks for your help.