diff --git a/filcnaplo/lib/helpers/notification_helper.dart b/filcnaplo/lib/helpers/notification_helper.dart
index fd70e10..6f6f9a4 100644
--- a/filcnaplo/lib/helpers/notification_helper.dart
+++ b/filcnaplo/lib/helpers/notification_helper.dart
@@ -195,7 +195,7 @@ class NotificationsHelper {
           if (userProvider.getUsers().length == 1) {
             await flutterLocalNotificationsPlugin.show(
               absence.id.hashCode,
-              "title_absence".i18n,
+              "title_absence".i18n, // https://discord.com/channels/1111649116020285532/1153273625206591528
               "body_absence".i18n.fill(
                 [
                   DateFormat("yyyy-MM-dd").format(absence.date),
@@ -210,7 +210,7 @@ class NotificationsHelper {
           } else {
             await flutterLocalNotificationsPlugin.show(
               absence.id.hashCode,
-              "title_absence".i18n,
+              "title_absence".i18n, // https://discord.com/channels/1111649116020285532/1153273625206591528
               "body_absence_multiuser".i18n.fill(
                 [
                   userProvider.displayName!,
diff --git a/filcnaplo_desktop_ui/lib/pages/grades/grades_page.dart b/filcnaplo_desktop_ui/lib/pages/grades/grades_page.dart
index 619756a..0a2099b 100644
--- a/filcnaplo_desktop_ui/lib/pages/grades/grades_page.dart
+++ b/filcnaplo_desktop_ui/lib/pages/grades/grades_page.dart
@@ -144,8 +144,8 @@ class _GradesPageState extends State<GradesPage> {
           Expanded(
             child: StatisticsTile(
               outline: true,
-              title: AutoSizeText(
-                "classavg".i18n,
+              title: AutoSizeText( // https://discord.com/channels/1111649116020285532/1153397476578050130
+                "classavg".i18n, 
                 textAlign: TextAlign.center,
                 maxLines: 2,
                 wrapWords: false,
diff --git a/filcnaplo_mobile_ui/lib/common/widgets/absence/absence_view.dart b/filcnaplo_mobile_ui/lib/common/widgets/absence/absence_view.dart
index 23ec169..1ffac65 100755
--- a/filcnaplo_mobile_ui/lib/common/widgets/absence/absence_view.dart
+++ b/filcnaplo_mobile_ui/lib/common/widgets/absence/absence_view.dart
@@ -127,7 +127,7 @@ class AbsenceView extends StatelessWidget {
                   maxLines: 2,
                   overflow: TextOverflow.ellipsis,
                 ),
-                onPressed: () {
+                onPressed: () { // https://discord.com/channels/1111649116020285532/1149964760130002945
                   Navigator.of(context).pop();
 
                   if (outsideContext != null) {
diff --git a/filcnaplo_mobile_ui/lib/common/widgets/lesson/changed_lesson_tile.dart b/filcnaplo_mobile_ui/lib/common/widgets/lesson/changed_lesson_tile.dart
index 68540ab..7125d2b 100755
--- a/filcnaplo_mobile_ui/lib/common/widgets/lesson/changed_lesson_tile.dart
+++ b/filcnaplo_mobile_ui/lib/common/widgets/lesson/changed_lesson_tile.dart
@@ -57,7 +57,7 @@ class ChangedLessonTile extends StatelessWidget {
             ),
           ),
           title: Text(
-            lesson.substituteTeacher?.name != ""
+            lesson.substituteTeacher?.name != "" || lesson.substituteTeacher?.name != null
                 ? "substituted".i18n
                 : "cancelled".i18n,
             maxLines: 2,
diff --git a/filcnaplo_mobile_ui/lib/pages/absences/absence_subject_view.dart b/filcnaplo_mobile_ui/lib/pages/absences/absence_subject_view.dart
index dcf162f..dc184e7 100755
--- a/filcnaplo_mobile_ui/lib/pages/absences/absence_subject_view.dart
+++ b/filcnaplo_mobile_ui/lib/pages/absences/absence_subject_view.dart
@@ -40,7 +40,7 @@ class AbsenceSubjectView extends StatelessWidget {
             TimetablePage.jump(context, lesson: lesson);
           } else {
             ScaffoldMessenger.of(context).showSnackBar(CustomSnackBar(
-              content: Text("Cannot find lesson".i18n,
+              content: Text("lesson_not_found".i18n,
                   style: const TextStyle(color: Colors.white)),
               backgroundColor: AppColors.of(context).red,
               context: context,
diff --git a/filcnaplo_mobile_ui/lib/pages/absences/absences_page.i18n.dart b/filcnaplo_mobile_ui/lib/pages/absences/absences_page.i18n.dart
index 91b7621..61c971a 100755
--- a/filcnaplo_mobile_ui/lib/pages/absences/absences_page.i18n.dart
+++ b/filcnaplo_mobile_ui/lib/pages/absences/absences_page.i18n.dart
@@ -17,6 +17,7 @@ extension ScreensLocalization on String {
           "Subjects": "Subjects",
           "attention": "Attention!",
           "attention_body": "Percentage calculations are only an approximation so they may not be accurate.",
+          "lesson_not_found": "Cannot find lesson",
         },
         "hu_hu": {
           "Absences": "Hiányzások",
@@ -32,6 +33,7 @@ extension ScreensLocalization on String {
           "Subjects": "Tantárgyak",
           "attention": "Figyelem!",
           "attention_body": "A százalékos számítások csak közelítések, ezért előfordulhat, hogy nem pontosak.",
+          "lesson_not_found": "Nem található óra",
         },
         "de_de": {
           "Absences": "Fehlen",
@@ -47,6 +49,7 @@ extension ScreensLocalization on String {
           "Subjects": "Fächer",
           "attention": "Achtung!",
           "attention_body": "Prozentberechnungen sind nur eine Annäherung und können daher ungenau sein.",
+          "lesson_not_found": "Lektion kann nicht gefunden werden",
         },
       };
 
diff --git a/filcnaplo_premium/lib/ui/mobile/settings/theme.dart b/filcnaplo_premium/lib/ui/mobile/settings/theme.dart
index cbe4d40..1d2b3b1 100644
--- a/filcnaplo_premium/lib/ui/mobile/settings/theme.dart
+++ b/filcnaplo_premium/lib/ui/mobile/settings/theme.dart
@@ -329,7 +329,7 @@ class _PremiumCustomAccentColorSettingState
                           width: double.infinity,
                           decoration: BoxDecoration(
                             borderRadius: BorderRadius.circular(24),
-                            gradient: LinearGradient(
+                            gradient: LinearGradient( // https://discord.com/channels/1111649116020285532/1153619667848548452
                                 begin: Alignment.topCenter,
                                 end: Alignment.bottomCenter,
                                 stops: const [