fix(column): reset decor state before starting from top

src/nvim/drawscreen.c

@@ -2335,6 +2335,7 @@ static void win_update(win_T *wp, DecorProviders *providers)
       lnum = wp->w_topline;
       wp->w_lines_valid = 0;
       wp->w_valid &= ~VALID_WCOL;
+      decor_redraw_reset(wp, &decor_state);
       decor_providers_invoke_win(wp, providers, &line_providers);
       continue;
     }