Add reset for GetFrameTime()

src/platforms/rcore_desktop_glfw.c

@@ -1739,7 +1739,12 @@ static void WindowContentScaleCallback(GLFWwindow *window, float scalex, float s
 static void WindowIconifyCallback(GLFWwindow *window, int iconified)
 {
     if (iconified) CORE.Window.flags |= FLAG_WINDOW_MINIMIZED;  // The window was iconified
-    else CORE.Window.flags &= ~FLAG_WINDOW_MINIMIZED;           // The window was restored
+    else
+    {
+        CORE.Window.flags &= ~FLAG_WINDOW_MINIMIZED;           // The window was restored
+
+        if ((CORE.Window.flags & FLAG_WINDOW_ALWAYS_RUN) == 0) CORE.Time.previous = GetTime();
+    }
 }
 
 // GLFW3 WindowMaximize Callback, runs when window is maximized/restored

src/platforms/rcore_desktop_sdl.c

@@ -1499,6 +1499,8 @@ void PollInputEvents(void)
                             if ((CORE.Window.flags & SDL_WINDOW_MAXIMIZED) > 0) CORE.Window.flags &= ~SDL_WINDOW_MAXIMIZED;
                         }
                         #endif
+
+                        if ((CORE.Window.flags & FLAG_WINDOW_ALWAYS_RUN) == 0) CORE.Time.previous = GetTime();
                     } break;
 
                     case SDL_WINDOWEVENT_HIDDEN: