HomeAssistant do not work since 2.5.1 update

Hi everyone,

I bought one Shelly Wall Display about a month ago for testing and setup with Home Assistant. At that time I have updated to latest firmware 2.4.4 (if I remember correctly).
When I first opened the Home Assistant page on it, everything worked perfectly — the login prompt appeared, I entered my credentials, and the dashboard loaded fine.

Yesterday, I installed three more Wall Displays and updated them all to the latest firmware 2.5.1 — and I really shouldn’t have done that.
Now, Home Assistant no longer loads properly on these new devices:

• It only shows a white page with the Home Assistant logo,
• The login prompt never appears,
• And it seems impossible to downgrade the firmware.

So right now, I have three brand new displays that are useless, because I can’t get Home Assistant to show up.
Interestingly, my original display that I first set up on 2.4.4 and later upgraded to 2.5.1 still works fine.

Shelly is there a possibiility to download or downgrade firmware versions manually?

Has anyone found a workaround to make Home Assistant work again on FW 2.5.1, or knows where to get and install the older 2.4.4 firmware?

Any help would be appreciated!

— Martin

Refreshed it many times, restarted, and restored to defaults — nothing helps. It only shows a white screen with the HA logo.

Just one additional note: when I installed my first device a few weeks ago, I remember that it first updated to version 2.4.4, then I added the HA URL and enabled HA, and it required an additional update afterward. However, when installing the new device yesterday, this additional update after enabling HA did not appear.

Maybe it’s relevant, maybe not — but I tried many things yesterday and nothing worked. I also added the display’s IP address as a trusted device so that access should be allowed without login, but that didn’t help either. It always shows only the white screen with the HA logo.