v.028 / Unlisted options for checkbox group remove value when edit again

[aramollis]

Describe the bug
I activated "Unlisted options" for checkbox group. When I edit again the proposal the value I originally defined is removed in the editor.

To Reproduce
Steps to reproduce the behavior:

1. I activated "Unlisted options" for checkbox group to proposal component: https://decidim-awesome.dev.pokecode.net/admin/decidim_awesome/config/proposal_custom_fields?locale=ca

2. I created a proposal with "other checkbox" value

3. When I edit again the proposal the value for "other options" was removed/not visible

Expected behavior
The value for "other options" field should be shown when I edit again the proposal

[aramollis]

Checked and still happens
https://www.loom.com/share/f28cc19a84b148828ed4d614163b01f3