OSK hides a half second after popping up on some input fields with zwp_text_input_v1 (Electron)

[Saviq]

Steps:

• tweak https://github.com/canonical/iot-example-graphical-snap/tree/22/Electron-quick-start to point at:
  https://demo.inductiveautomation.com/data/perspective/client/OnlineDemo/feature/reporting/examples
• build and install it
• start Mir, ubuntu-frame-osk and iot-example-graphical-snap
• find and focus the "Inteval" field

Expected:

• OSK pops up and stays up

Current:

• OSK pops up and quickly hides again

Even though the there's a lot of traffic, nothing in the client wayland requests suggests it should be hiding:

[4063403.674]  -> [email protected]()
[4063414.767]  -> [email protected]()
[4063418.886]  -> [email protected](wl_seat@10, wl_surface@21)
[4063418.907]  -> [email protected]_content_type(4, 3)
[4063419.005]  -> [email protected]_input_panel()
[4063419.051]  -> [email protected]_cursor_rectangle(1022, 354, 246, 236)
[4063419.086]  -> [email protected]_surrounding_text("1", 1, 1)
[4063419.253]  -> [email protected]_cursor_rectangle(1022, 354, 246, 236)
[4063419.343]  -> [email protected]_cursor_rectangle(1010, 513, 0, 20)
[4063419.378]  -> [email protected]()
[4063419.461]  -> [email protected]_input_panel()
[4063419.471]  -> [email protected]_cursor_rectangle(1010, 513, 0, 20)
[4063419.497]  -> [email protected]_cursor_rectangle(1010, 513, 0, 20)
[4063419.510]  -> [email protected]_surrounding_text("1", 0, 1)
[4063419.542]  -> [email protected]_cursor_rectangle(1010, 513, 0, 20)
[4063419.603] [email protected]()
[4063419.615] [email protected](wl_surface@21)
[4063419.633]  -> [email protected]_cursor_rectangle(1003, 513, 7, 20)
[4063421.949]  -> [email protected]_cursor_rectangle(1003, 513, 7, 20)
[4063422.271]  -> [email protected]_cursor_rectangle(1003, 513, 7, 20)
[4063519.588]  -> [email protected]_input_panel()
[4063519.610]  -> [email protected]_cursor_rectangle(1003, 513, 7, 20)
[4063622.079]  -> [email protected]_cursor_rectangle(1003, 513, 7, 20)
[4063622.377]  -> [email protected]_cursor_rectangle(1003, 513, 7, 20)