Bug: Starting today, thumbnails not being replaced on most videos

[adalinesimonian]

Starting today, most video thumbnails have stopped getting replaced. Some, however, are.

In the above screenshot you can see all videos with their original thumbnails, except for the video by Dashcam Lessons. On videos with the original thumbnails, clicking the DeArrow toggle button next to the thumbnail causes the button to disappear. On the video with the replaced thumbnail, the toggle button works.

Debug information

{
    "debug": {
        "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0",
        "platform": "Win32",
        "language": "nn-NO",
        "extensionVersion": "1.10"
    },
    "config": {
        "thumbnailReplacements": 50201,
        "showActivatedMessage": true,
        "allowExpirements": true,
        "showDonationLink": true,
        "showUpsells": true,
        "darkMode": true,
        "importedConfig": true,
        "firefoxOldContentScriptRegistration": false,
        "showInfoAboutRandomThumbnails": false,
        "titleReplacements": 10611,
        "activated": true,
        "alreadyActivated": true,
        "extensionEnabled": true,
        "vip": false,
        "donateClicked": 0,
        "invidiousInstances": 0,
        "keepUnsubmitted": true,
        "keepUnsubmittedInPrivate": false,
        "thumbnailSaturationLevel": 100,
        "titleFormatting": -1,
        "onlyFormatCustomTitles": false,
        "shouldCleanEmojis": true,
        "onlyTitleCaseInEnglish": false,
        "serverAddress": "Default server address",
        "thumbnailServerAddress": "https://dearrow-thumb.ajay.app",
        "fetchTimeout": 7000,
        "startLocalRenderTimeout": 2000,
        "renderTimeout": 25000,
        "thumbnailCacheUse": 2,
        "showGuidelineHelp": true,
        "thumbnailFallback": 0,
        "thumbnailFallbackAutogenerated": 0,
        "showLiveCover": true,
        "defaultToCustom": true,
        "alwaysShowShowOriginalButton": false,
        "showOriginalOnHover": false,
        "replaceTitles": true,
        "replaceThumbnails": true,
        "useCrowdsourcedTitles": true,
        "titleMaxLines": 3,
        "channelOverrides": {},
        "customConfigurations": {},
        "showIconForFormattedTitles": true,
        "countReplacements": true,
        "ignoreAbThumbnails": true,
        "ignoreTranslatedTitles": false,
        "hideDetailsWhileFetching": true,
        "firstThumbnailSubmitted": false,
        "freeTrialDuration": 21600000,
        "freeAccessWaitingPeriod": 259200000,
        "lastIncognitoStatus": false,
        "confirmGuidelinesCount": 0,
        "lastGuidelinesConfirmation": 0,
        "openMenuKey": {
            "key": "d",
            "shift": true
        },
        "enableExtensionKey": {
            "key": "e",
            "ctrl": true,
            "shift": true,
            "alt": true
        }
    }
}

I have a copy of the markup rendered on the page and am happy to share it privately.

[ajayyy]

Could you send it in an email to dev @ ajay.app