diff --git a/public/js/pages/Settings.js b/public/js/pages/Settings.js
index 57dc6d1..4b10395 100644
--- a/public/js/pages/Settings.js
+++ b/public/js/pages/Settings.js
@@ -154,12 +154,9 @@ class SettingsPage {
         const presentation = LiveAnalysisPresentation.present(status);
         buttons.forEach(button => { button.disabled = presentation.busy; });
         const rebuildButton = document.getElementById('live-rebuild-catalog-button');
-        const fullRefreshPhases = new Set([
-            'refreshing_live_sources', 'refreshing_epg_sources', 'matching_epg',
-            'laya_epg_matching', 'writing_epg_matches'
-        ]);
         const fullRefreshBusy = presentation.busy &&
-            (this.currentLiveAnalysisAction === 'rebuild' || fullRefreshPhases.has(presentation.phase));
+            (this.currentLiveAnalysisAction === 'rebuild' ||
+                LiveAnalysisPresentation.isFullRefreshPhase(presentation.phase));
         if (rebuildButton) rebuildButton.textContent = fullRefreshBusy ? 'Refreshing…' : 'Run full refresh';
         statusElement.textContent = presentation.statusLabel;
         progress.hidden = !presentation.busy;
diff --git a/public/js/services/liveAnalysisPresentation.js b/public/js/services/liveAnalysisPresentation.js
index 9e218ac..22a6814 100644
--- a/public/js/services/liveAnalysisPresentation.js
+++ b/public/js/services/liveAnalysisPresentation.js
@@ -8,6 +8,14 @@
     const INDETERMINATE_PHASES = new Set([
         'writing', 'refreshing_live_sources', 'refreshing_epg_sources', 'writing_epg_matches'
     ]);
+    const FULL_REFRESH_PHASES = new Set([
+        'refreshing_live_sources', 'laya_identity', 'laya_language', 'projecting', 'writing',
+        'refreshing_epg_sources', 'matching_epg', 'laya_epg_matching', 'writing_epg_matches'
+    ]);
+
+    function isFullRefreshPhase(phase) {
+        return FULL_REFRESH_PHASES.has(String(phase || '').toLowerCase());
+    }
 
     function progressValues(status, phase) {
         if (phase === 'laya_identity') {
@@ -93,5 +101,5 @@
             : '';
     }
 
-    return { layaFallbackMessage, present };
+    return { isFullRefreshPhase, layaFallbackMessage, present };
 });
diff --git a/test/liveAnalysisPresentation.test.js b/test/liveAnalysisPresentation.test.js
index 71e00b6..11fd493 100644
--- a/test/liveAnalysisPresentation.test.js
+++ b/test/liveAnalysisPresentation.test.js
@@ -1,6 +1,16 @@
 const test = require('node:test');
 const assert = require('node:assert/strict');
-const { layaFallbackMessage, present } = require('../public/js/services/liveAnalysisPresentation.js');
+const { isFullRefreshPhase, layaFallbackMessage, present } = require('../public/js/services/liveAnalysisPresentation.js');
+
+test('classifies every persisted full refresh phase centrally', () => {
+    const phases = [
+        'refreshing_live_sources', 'laya_identity', 'laya_language', 'projecting', 'writing',
+        'refreshing_epg_sources', 'matching_epg', 'laya_epg_matching', 'writing_epg_matches'
+    ];
+    assert.ok(phases.every(isFullRefreshPhase));
+    assert.equal(isFullRefreshPhase('complete'), false);
+    assert.equal(isFullRefreshPhase(''), false);
+});
 
 test('presents determinate channel analysis progress', () => {
     const view = present({ status: 'building', phase: 'projecting', processed: 25, total: 100 });
diff --git a/test/t44FullRefreshLiveRegression.test.js b/test/t44FullRefreshLiveRegression.test.js
new file mode 100644
index 0000000..8874d2c
--- /dev/null
+++ b/test/t44FullRefreshLiveRegression.test.js
@@ -0,0 +1,57 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+const { JSDOM } = require('jsdom');
+
+const root = path.resolve(__dirname, '..');
+const readPublicScript = relativePath => fs.readFileSync(path.join(root, 'public', relativePath), 'utf8');
+
+function createSettingsDom() {
+    const dom = new JSDOM(`<!doctype html>
+        <button type="button" id="live-check-new-button">Check for new streams</button>
+        <button type="button" id="live-rebuild-catalog-button">Run full refresh</button>
+        <button type="button" id="live-analysis-button">Analyze channels</button>
+        <div id="live-analysis-status" role="status"></div>
+        <div id="live-analysis-progress" hidden>
+          <div id="live-analysis-progress-track"><span id="live-analysis-progress-bar"></span></div>
+          <div id="live-analysis-progress-text"></div>
+        </div>
+        <div id="live-analysis-fallback"></div>
+        <button type="button" id="live-analysis-details-toggle" hidden></button>
+        <pre id="live-analysis-error-details" hidden></pre>
+    `, { url: 'http://nodecast.test/', runScripts: 'outside-only' });
+    const { window } = dom;
+    window.eval(readPublicScript('js/services/liveAnalysisPresentation.js'));
+    window.eval(`${readPublicScript('js/pages/Settings.js')}\nwindow.SettingsPage = SettingsPage;`);
+    return { dom, window };
+}
+
+test('full refresh keeps the rebuild action visibly busy during Laya language detection from persisted status', () => {
+    const { dom, window } = createSettingsDom();
+    const settingsPage = Object.create(window.SettingsPage.prototype);
+    settingsPage.app = { player: { settings: { languageDetectionMode: 'laya' } } };
+    settingsPage.layaStatus = { modelPresent: true, runtimeAvailable: true };
+    settingsPage.currentLiveAnalysisAction = '';
+
+    try {
+        settingsPage.renderLiveAnalysisStatus({
+            status: 'building',
+            phase: 'laya_language',
+            phaseProcessed: 2,
+            phaseTotal: 4,
+            processed: 0,
+            total: 128
+        });
+
+        assert.equal(window.document.getElementById('live-analysis-status').textContent, 'Detecting stream languages…');
+        assert.equal(window.document.getElementById('live-analysis-progress-text').textContent, 'Language batch 2 of 4 · 50%');
+        assert.equal(
+            window.document.getElementById('live-rebuild-catalog-button').textContent,
+            'Refreshing…',
+            'full refresh should remain visibly active while the backend publishes laya_language'
+        );
+    } finally {
+        dom.window.close();
+    }
+});