Not working: Backup and restore of settings and learned word / history data

[les-incompetent]

I'd love to use Heliboard across devices and, so as not having to setup each instance from scratch (I've made custom layout changes, dictionary additions, word shortcuts etc) I thought it would be easy to backup my settings from my phone (primary device) and import those into any additional devices I use - but the settings/custom changes don't come across as expected.

Same if I try to restore the HeliBoard_backup.zip to the same phone I created the backup on (in my case a Galaxy S23) - custom changes don't restore.

To Reproduce
Backup via:
Settings>Advanced>Backup and restore>Backup

Expected behavior
Per features page:
"Backup and restore your settings and learned word / history data"

Screenshots
N/A

App version
2.2

Device:

• Model: Samsung Galaxy S23
• OS: Android 14 (using the manufacturer's OS)