diff --git a/Telegram/SourceFiles/history/history.cpp b/Telegram/SourceFiles/history/history.cpp
index 9964bbcf1..c9462f5de 100644
--- a/Telegram/SourceFiles/history/history.cpp
+++ b/Telegram/SourceFiles/history/history.cpp
@@ -1661,11 +1661,11 @@ void History::addOlderSlice(const QVector<MTPMessage> &slice) {
 
 	logged.push_back(QString::number(minAdded));
 	logged.push_back(QString::number(maxAdded));
-	SignalHandlers::setCrashAnnotation("add", logged.join(";"));
+	SignalHandlers::setCrashAnnotation("old_minmaxwas_minmaxadd", logged.join(";"));
 
 	addBlockToSharedMedia(block);
 
-	SignalHandlers::setCrashAnnotation("add", "");
+	SignalHandlers::setCrashAnnotation("old_minmaxwas_minmaxadd", "");
 
 	if (isChannel()) {
 		asChannelHistory()->checkJoinedMessage();
@@ -1723,7 +1723,7 @@ void History::addNewerSlice(const QVector<MTPMessage> &slice) {
 		}
 		logged.push_back(QString::number(minAdded));
 		logged.push_back(QString::number(maxAdded));
-		SignalHandlers::setCrashAnnotation("add", logged.join(";"));
+		SignalHandlers::setCrashAnnotation("new_minmaxwas_minmaxadd", logged.join(";"));
 
 		if (!atLeastOneAdded) {
 			newLoaded = true;
@@ -1731,7 +1731,7 @@ void History::addNewerSlice(const QVector<MTPMessage> &slice) {
 		}
 		addToSharedMedia(medias, wasLoadedAtBottom != loadedAtBottom());
 
-		SignalHandlers::setCrashAnnotation("add", "");
+		SignalHandlers::setCrashAnnotation("new_minmaxwas_minmaxadd", "");
 	}
 
 	if (!wasLoadedAtBottom) {
diff --git a/Telegram/SourceFiles/history/history_widget.cpp b/Telegram/SourceFiles/history/history_widget.cpp
index 395163d9f..013268d6b 100644
--- a/Telegram/SourceFiles/history/history_widget.cpp
+++ b/Telegram/SourceFiles/history/history_widget.cpp
@@ -2316,7 +2316,13 @@ void HistoryWidget::messagesReceived(PeerData *peer, const MTPmessages_Messages
 	}
 
 	if (_preloadRequest == requestId) {
+		auto to = toMigrated ? _migrated : _history;
+		SignalHandlers::setCrashAnnotation("old_minmaxbefore_minmaxnow", QString("%1;%2;%3;%4").arg(_debug_preloadMin).arg(_debug_preloadMax).arg(to->minMsgId()).arg(to->maxMsgId()));
+
 		addMessagesToFront(peer, *histList);
+
+		SignalHandlers::setCrashAnnotation("old_minmaxbefore_minmaxnow", QString());
+
 		_preloadRequest = 0;
 		preloadHistoryIfNeeded();
 		if (_reportSpamStatus == dbiprsUnknown) {
@@ -2324,7 +2330,13 @@ void HistoryWidget::messagesReceived(PeerData *peer, const MTPmessages_Messages
 			if (_reportSpamStatus != dbiprsUnknown) updateControlsVisibility();
 		}
 	} else if (_preloadDownRequest == requestId) {
+		auto to = toMigrated ? _migrated : _history;
+		SignalHandlers::setCrashAnnotation("new_minmaxbefore_minmaxnow", QString("%1;%2;%3;%4").arg(_debug_preloadDownMin).arg(_debug_preloadDownMax).arg(to->minMsgId()).arg(to->maxMsgId()));
+
 		addMessagesToBack(peer, *histList);
+
+		SignalHandlers::setCrashAnnotation("new_minmaxbefore_minmaxnow", QString());
+
 		_preloadDownRequest = 0;
 		preloadHistoryIfNeeded();
 		if (_history->loadedAtBottom() && App::wnd()) App::wnd()->checkHistoryActivation();
@@ -2516,6 +2528,8 @@ void HistoryWidget::loadMessages() {
 	auto minId = 0;
 	auto historyHash = 0;
 
+	_debug_preloadMin = from->minMsgId();
+	_debug_preloadMax = from->maxMsgId();
 	_preloadRequest = MTP::send(
 		MTPmessages_GetHistory(
 			from->peer->input,
@@ -2556,6 +2570,8 @@ void HistoryWidget::loadMessagesDown() {
 	auto minId = 0;
 	auto historyHash = 0;
 
+	_debug_preloadDownMin = from->minMsgId();
+	_debug_preloadDownMax = from->maxMsgId();
 	_preloadDownRequest = MTP::send(
 		MTPmessages_GetHistory(
 			from->peer->input,
diff --git a/Telegram/SourceFiles/history/history_widget.h b/Telegram/SourceFiles/history/history_widget.h
index 04ce26faa..20b53b376 100644
--- a/Telegram/SourceFiles/history/history_widget.h
+++ b/Telegram/SourceFiles/history/history_widget.h
@@ -725,6 +725,11 @@ private:
 	mtpRequestId _preloadRequest = 0;
 	mtpRequestId _preloadDownRequest = 0;
 
+	MsgId _debug_preloadMin = 0;
+	MsgId _debug_preloadMax = 0;
+	MsgId _debug_preloadDownMin = 0;
+	MsgId _debug_preloadDownMax = 0;
+
 	MsgId _delayedShowAtMsgId = -1; // wtf?
 	mtpRequestId _delayedShowAtRequest = 0;