...

tg/page.go

@@ -90,8 +90,13 @@ func (p *Page) Filter(
 }
 
 func (p *Page) Serve(c *Context) {
+	pth := c.Path()
 	if p.Action != nil {
 		c.Run(p.Action, c.Update)
+		if pth != c.Path() {
+			// If we went somewhere else then do nothing.
+			return
+		}
 	}
 	msgs, _ := c.Render(p)
 	inlineMsg := msgs["page/inline"]

tg/private.go

@@ -221,5 +221,9 @@ func (c *Context) ReadString(pref string, args ...any) string {
 // Change screen to the previous.
 // To get to the parent screen use GoUp.
 func (c *Context) GoPrev() {
-	c.Go(c.PrevPath())
+	pth := c.PrevPath()
+	if pth == "" {
+		c.Go("/")
+	}
+	c.Go(pth)
 }