diff --git a/src/terminal.go b/src/terminal.go
index 4d207b4..2378984 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -558,6 +558,11 @@ func (t *Terminal) resizeWindows() {
 			width,
 			height, false)
 	}
+	if !t.tui.IsOptimized() && t.theme != nil && t.theme.HasBg() {
+		for i := 0; i < t.window.Height(); i++ {
+			t.window.MoveAndClear(i, 0)
+		}
+	}
 }
 
 func (t *Terminal) move(y int, x int, clear bool) {
diff --git a/src/tui/tui.go b/src/tui/tui.go
index fd4a21e..c8bd5fb 100644
--- a/src/tui/tui.go
+++ b/src/tui/tui.go
@@ -175,6 +175,10 @@ type ColorTheme struct {
 	Border       Color
 }
 
+func (t *ColorTheme) HasBg() bool {
+	return t.Bg != colDefault
+}
+
 type Event struct {
 	Type       int
 	Char       rune