Update app.py

app.py

@@ -90,7 +90,7 @@ def ac():
         b3=out1.change(im_fn,[put,fac_b,h],[out2,fac_b])        
         b4=out2.change(im_fn,[put,fac_b,h],[out3,fac_b])        
         b5=out3.change(im_fn,[put,fac_b,h],[out4,fac_b])        
-        t_switch.change(clear,t_switch,t_switch, cancels=[sta,b2,b3,b4,b5])
+        t_switch.change(clear,t_switch,t_switch, cancels=[sta,b1,b2,b3,b4,b5])
 
     b.queue(concurrency_count=100).launch(show_api=False)
 ac()