revert a9fc440, use Clock.schedule_interval to set address. Fixes #6810 and #6817

electrum/gui/kivy/uix/dialogs/addresses.py

@@ -1,6 +1,7 @@
 from typing import TYPE_CHECKING
 
 from kivy.app import App
+from kivy.clock import Clock
 from kivy.factory import Factory
 from kivy.properties import ObjectProperty
 from kivy.lang import Builder
@@ -206,7 +207,8 @@ class AddressPopup(Popup):
         self.dismiss()
         self.parent_dialog.dismiss()
         self.app.switch_to('receive')
-        self.app.receive_screen.set_address(self.address)
+        # retry until receive_screen is set
+        Clock.schedule_interval(lambda dt: bool(self.app.receive_screen.set_address(self.address) and False) if self.app.receive_screen else True, 0.1)
 
     def do_export(self, pk_label):
         self.app.export_private_keys(pk_label, self.address)

electrum/gui/kivy/uix/screens.py

@@ -71,6 +71,7 @@ class CScreen(Factory.Screen):
         pass
 
     def on_activate(self):
+        setattr(self.app, self.kvname + '_screen', self)
         self.update()
 
     def on_leave(self):
@@ -618,7 +619,6 @@ class TabbedCarousel(Factory.TabbedPanel):
         if carousel.current_slide != slide:
             carousel.current_slide.dispatch('on_leave')
             carousel.load_slide(slide)
-            setattr(slide.app, slide.kvname + '_screen', slide)
             slide.dispatch('on_enter')
 
     def add_widget(self, widget, index=0):