[Bug] Custom cards vanished

[WorldTeacher]

Home Assistant Version

2025.8.1

Bambu Lab Integration Version

v2.1.27 / v2.1.28Beta6

Describe the bug

I previously had a sidebar page that contained the bambulab cards for the printer. I started a print today and opened the page, only to be greeted by three warnings: "Configuration error: Custom element doesn't exist: ha-bambulab-ams-card | -print_control-card | print_status-card"

To Reproduce

1. Install version
2. set up integration
3. try to add the cards

Expected Behaviour

The cards should be present

Added diagnostic output here, since the fields below do not allow uploading files
config_entry-bambu_lab-f044196dba721d3e985b9c812776fc75.json

What device are you using?

P1S

Diagnostic Output

unable to upload file, see above

Log Extracts

Other Information

The issue persists even when upgrading the integration

[AdrianGarside]

Does it fix itself if you downgrade your home assistant version?

[WorldTeacher]

Yes, I restored a backup yesterday and now the cards are back. I then upgraded home assistant back to 2025.8.1 and the cards stayed available

[cpetry]

Got the same problem.
Updated to latest HA versions:

• Core 2025.9.1
• Operating System 16.2

Custom cards are gone.

EDIT:
Now they appeared again!
"Reboot tut gut" -> after a fresh reboot of HA all the cards are back again.