diff --git a/src/base_grid.cpp b/src/base_grid.cpp
index 5d8bf17ee..f3c236196 100644
--- a/src/base_grid.cpp
+++ b/src/base_grid.cpp
@@ -130,14 +130,10 @@ void BaseGrid::OnSubtitlesCommit(int type) {
 	if (type == AssFile::COMMIT_NEW || type & AssFile::COMMIT_ORDER || type & AssFile::COMMIT_DIAG_ADDREM)
 		UpdateMaps();
 
-	if (type & AssFile::COMMIT_DIAG_META) {
+	if (type & AssFile::COMMIT_DIAG_META || type & AssFile::COMMIT_DIAG_TIME) {
 		SetColumnWidths();
 		Refresh(false);
-		return;
-	}
-	if (type & AssFile::COMMIT_DIAG_TIME)
-		Refresh(false);
-	else if (type & AssFile::COMMIT_DIAG_TEXT) {
+	} else if (type & AssFile::COMMIT_DIAG_TEXT) {
 		for (auto const& rect : text_refresh_rects)
 			RefreshRect(rect, false);
 	}
diff --git a/src/grid_column.cpp b/src/grid_column.cpp
index 321a09439..aff198513 100644
--- a/src/grid_column.cpp
+++ b/src/grid_column.cpp
@@ -158,10 +158,10 @@ struct GridColumnStartTime final : GridColumnTime {
 	}
 
 	int Width(const agi::Context *c, WidthHelper &helper) const override {
+		agi::Time max_time = max_value(&AssDialogue::Start, c->ass->Events);
 		if (!by_frame)
-			return helper(wxS("0:00:00.00"));
-		int frame = c->videoController->FrameAtTime(max_value(&AssDialogue::Start, c->ass->Events), agi::vfr::START);
-		return helper(std::to_wstring(frame));
+			return helper(max_time.GetAssFormatted());
+		return helper(std::to_wstring(c->videoController->FrameAtTime(max_time, agi::vfr::START)));
 	}
 };
 
@@ -176,10 +176,10 @@ struct GridColumnEndTime final : GridColumnTime {
 	}
 
 	int Width(const agi::Context *c, WidthHelper &helper) const override {
+		agi::Time max_time = max_value(&AssDialogue::End, c->ass->Events);
 		if (!by_frame)
-			return helper(wxS("0:00:00.00"));
-		int frame = c->videoController->FrameAtTime(max_value(&AssDialogue::End, c->ass->Events), agi::vfr::END);
-		return helper(std::to_wstring(frame));
+			return helper(max_time.GetAssFormatted());
+		return helper(std::to_wstring(c->videoController->FrameAtTime(max_time, agi::vfr::END)));
 	}
 };