Tab auf Loginseite führt zu Fehler

[JanneckLange]

Nach dem Logout kann man im Feld Mitgliedsnummer auf der Loginseite nicht mit Tab ins Passwort Feld springen.

Prio gering, Handy nutzt in der Regel kein Tab

════════ Exception caught by services library ══════════════════════════════════
Tried to get the bounds of a focus node that didn't have its context set yet.
The context needs to be set before trying to evaluate traversal policies. Setting the context is typically done with the attach method.
'package:flutter/src/widgets/focus_manager.dart':
Failed assertion: line 837 pos 7: 'context != null'

════════ Exception caught by services library ══════════════════════════════════
The following assertion was thrown while processing the key message handler:
Tried to get the bounds of a focus node that didn't have its context set yet.
The context needs to be set before trying to evaluate traversal policies. Setting the context is typically done with the attach method.
'package:flutter/src/widgets/focus_manager.dart':
Failed assertion: line 837 pos 7: 'context != null'

Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
  https://github.com/flutter/flutter/issues/new?template=2_bug.yml


KeyMessage: KeyMessage([KeyDownEvent#f4e8e(physicalKey: PhysicalKeyboardKey#e9c9a(usbHidUsage: "0x0007002b", debugName: "Tab"), logicalKey: LogicalKeyboardKey#1ba88(keyId: "0x100000009", keyLabel: "Tab", debugName: "Tab"), character: "	", timeStamp: 44:59:40.115807)])