Automation trace file downloads do nothing while diagnostics downloads work

[fir3drag0n]

Android App (Beta): Automation trace file downloads do nothing while diagnostics downloads work

Home Assistant Android app version(s):
2026.1.4-full (Beta)
io.homeassistant.companion.android

Android version(s):
Android 16

Device model(s):
Google Pixel 9 Pro

Home Assistant version:
Home Assistant Core 2026.1.x (current stable)

Last working Home Assistant release (if known):
Earlier Android app beta versions (exact version unknown)

Description of problem, include YAML if issue is related to notifications:
This appears to be a regression in recent Android app beta versions.

Downloading diagnostics files from the Home Assistant Android app works as expected.
However, downloading automation trace files no longer works.

When tapping a download link for an automation trace file inside the app:

• no download dialog is shown
• no file is saved
• no error message is displayed

The same automation trace download link works correctly when opened in an external browser
(e.g. Chrome), where the file is downloaded immediately.

This issue affects:

• Automation trace downloads
• Links opened inside the in-app WebView

This does not affect:

• Diagnostics downloads (these work correctly)
• External browsers

Expected behavior:

• Tapping an automation trace download link should start a file download or show a system download dialog

Actual behavior:

• Tapping the link inside the app results in no action (silent failure)

Companion App Logs:

[jpelgrom]

It looks like this is actually because of a frontend change.

Downloading traces now generates a blob download, which is implemented by #5515 and hasn't changed. In the console I get an error GET blob:https://ha.example.com/72343d00-a33d-441b-9bbe-944985c0e3d1 net::ERR_FILE_NOT_FOUND.

Suspecting: home-assistant/frontend#28519 which immediately revokes the blob after download is sent to the browser.