This happens in case the maps backend does not find the given address or when the autocomplete is incorrectly configured.

So we need a bit more information for this:

1. Do you have map services configured for the instance where you tested this?
2. If you have map services configured, can you share all the configurations you have, such as which service you are using for geocoding and which service are you using for the front-end autocompletion? Of course, do not post any sensitive information, such as your API keys.

I tested this locally with HERE Maps as well as without any map service and it worked fine for me.

When HERE Maps was enabled I tested both cases:

• Selecting one result from the autocomplete address list
• Not selecting anything from the autocomplete address list (when geocoding happens at the backend)

Both cases worked fine on develop.

It could be also that this issue has been already fixed and I suspect PR #8430 (which became part of 0.26.0) if this is the case. Could you re-test this using 0.26.0 or the latest version at develop?

Thx @ahukkanen

In the picture below, you'll see the lines changed in config/initializers/decidim.rb

The picture below is the screen shot of my geocoder.rb