This problem has been resolved. Thanks to @geeksville and community members.
Some versions and firmware between the problem and resolution environments are not verified.
[Problem environment]
- Meshtastic firmware : ttgo-lora32-v1-JP-0.68
- APP ver : 0.7.2
[Resolution environment]
- Meshtastic firmware : ttgo-lora32-v1-JP-0.76
- APP ver : 0.7.78
