diff --git a/Telegram/SourceFiles/storage/download_manager_mtproto.cpp b/Telegram/SourceFiles/storage/download_manager_mtproto.cpp
index 4ba4a9ce92..1af23d665b 100644
--- a/Telegram/SourceFiles/storage/download_manager_mtproto.cpp
+++ b/Telegram/SourceFiles/storage/download_manager_mtproto.cpp
@@ -171,6 +171,10 @@ void DownloadManagerMtproto::checkSendNext(MTP::DcId dcId, Queue &queue) {
 	}
 }
 
+void DownloadManagerMtproto::checkSendNextAfterSuccess(MTP::DcId dcId) {
+	checkSendNext(dcId, _queues[dcId]);
+}
+
 bool DownloadManagerMtproto::trySendNextPart(MTP::DcId dcId, Queue &queue) {
 	auto &balanceData = _balanceData[dcId];
 	const auto &sessions = balanceData.sessions;
@@ -227,10 +231,6 @@ void DownloadManagerMtproto::requestSucceeded(
 		crl::time timeAtRequestStart) {
 	using namespace rpl::mappers;
 
-	const auto guard = gsl::finally([&] {
-		checkSendNext(dcId, _queues[dcId]);
-	});
-
 	const auto i = _balanceData.find(dcId);
 	Assert(i != end(_balanceData));
 	auto &dc = i->second;
@@ -606,24 +606,34 @@ void DownloadMtprotoTask::normalPartLoaded(
 	const auto requestData = finishSentRequest(
 		requestId,
 		FinishRequestReason::Success);
+	const auto owner = _owner;
+	const auto dcId = this->dcId();
 	result.match([&](const MTPDupload_fileCdnRedirect &data) {
 		switchToCDN(requestData, data);
 	}, [&](const MTPDupload_file &data) {
 		partLoaded(requestData.offset, data.vbytes().v);
 	});
+
+	// 'this' may be deleted at this point.
+	owner->checkSendNextAfterSuccess(dcId);
 }
 
 void DownloadMtprotoTask::webPartLoaded(
 		const MTPupload_WebFile &result,
 		mtpRequestId requestId) {
+	const auto requestData = finishSentRequest(
+		requestId,
+		FinishRequestReason::Success);
+	const auto owner = _owner;
+	const auto dcId = this->dcId();
 	result.match([&](const MTPDupload_webFile &data) {
-		const auto requestData = finishSentRequest(
-			requestId,
-			FinishRequestReason::Success);
 		if (setWebFileSizeHook(data.vsize().v)) {
 			partLoaded(requestData.offset, data.vbytes().v);
 		}
 	});
+
+	// 'this' may be deleted at this point.
+	owner->checkSendNextAfterSuccess(dcId);
 }
 
 void DownloadMtprotoTask::cdnPartLoaded(const MTPupload_CdnFile &result, mtpRequestId requestId) {
@@ -647,6 +657,13 @@ void DownloadMtprotoTask::cdnPartLoaded(const MTPupload_CdnFile &result, mtpRequ
 		const auto requestData = finishSentRequest(
 			requestId,
 			FinishRequestReason::Success);
+		const auto owner = _owner;
+		const auto dcId = this->dcId();
+		const auto guard = gsl::finally([=] {
+			// 'this' may be deleted at this point.
+			owner->checkSendNextAfterSuccess(dcId);
+		});
+
 		auto key = bytes::make_span(_cdnEncryptionKey);
 		auto iv = bytes::make_span(_cdnEncryptionIV);
 		Expects(key.size() == MTP::CTRState::KeySize);
diff --git a/Telegram/SourceFiles/storage/download_manager_mtproto.h b/Telegram/SourceFiles/storage/download_manager_mtproto.h
index 46d91f3e05..9c467c16f0 100644
--- a/Telegram/SourceFiles/storage/download_manager_mtproto.h
+++ b/Telegram/SourceFiles/storage/download_manager_mtproto.h
@@ -51,6 +51,7 @@ public:
 		int index,
 		int amountAtRequestStart,
 		crl::time timeAtRequestStart);
+	void checkSendNextAfterSuccess(MTP::DcId dcId);
 	[[nodiscard]] int chooseSessionIndex(MTP::DcId dcId) const;
 
 private: