Flashing white screen in dark mode

[brishtibheja]

Checked for duplicates?

• This issue is not a duplicate

Does it also happen in the desktop version?

• This bug does not occur in the latest version of Anki Desktop

What are the steps to reproduce this bug?

Opening stats screen in dark mode:

Record_2025-01-29-04-24-24.mp4

This also happens in the congrats screen for AnkiDroid.

Forum discussion

Expected behaviour

No flickering

Debug info

AnkiDroid Version = 2.21alpha11 (b0d7b48431676f1ee721b4cae16065d50af0425a)
Backend Version = 0.1.49-anki25.01rc1 (25.01rc1 b65fa693dacbd92c0bdd2a8c3800d0827432d108)
Android Version = 11 (SDK 30)
ProductFlavor = full
Device Info = realme | realme | RMX2193 | RMX2193 | RMX2193 | mt6768
Webview User Agent = Mozilla/5.0 (Linux; Android 11; RMX2193 Build/RP1A.200720.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.260 Mobile Safari/537.36
ACRA UUID = cf265e01-9693-407f-984d-61ddf9698fac
FSRS = 2.0.2 (Enabled: true)
Crash Reports Enabled = true

(Optional) Anything else you want to share?

No response

Research

• I have checked the manual and the FAQ and could not find a solution to my issue
• (Optional) I have confirmed the issue is not resolved in the latest alpha release (instructions)

[BrayanDSO]

This bug does not occur in the latest version of Anki Desktop

Have you really tested that? You normally don't, and it does occur there. Not always, but it does. I am flagging it as upstream issue until someone finds a cause

Anki 25.01 (b65fa693)  
Python 3.9.18 Qt 6.6.2 PyQt 6.6.1
Platform: Windows-10-10.0.26100

2025-01-29.17-11-26.mp4

[david-allison]

Needs investigation, deckOptionsReady should have resolved it on the deck options side, but apparently there's still Deck Options issues.

Stats will be worse

See

• fix(deck-options): add progress bar to stop flickering #17891
• ankitects/anki@d7fc98d for deckOptionsReady

[BrayanDSO]

Stats will be worse

Idk what you mean by that, nor if you are suggesting to use a progress bar in stats as well, which I don't think that is a good idea

[david-allison]

Deck Options now receives a signal from the backend that loading is completed, and it's a heavy page load.

Stats doesn't have this signal, so the 'flash' will last for longer.

[BrayanDSO]

Not sure if a ready method actually necessary in Anki's code, but I'm not touching there, so good luck for whoever does.

[david-allison]

@Arthur-Milchior I used deckOptionsReady because you added it, any thoughts here?

[BrayanDSO]

IIRC, the flash happens because the Svelte pages start loading then set the dark mode colors later, so the background may be light before that. If that's still the case, it should be solvable (never dealt with Svelte/SvelteKit to be sure, but it really should be solvable)