TMT 250 “Failed to save configuration: SETPARAM_RESULT does not match” when editing Power Off\on event in features section

Hello, I have problem with saving configuration to device if make any changes to Power Off\on section. I mean i can click enable/disable just fine, but when i choose “sent to” to any number in system or edit “SMS Text” variable to any other string than “Power” I get an error show bellow. Any ideas? Tried flashing software, work with different configs, even one from the scrach.

Device FW 55.02.03 Rev:05

Configurator: 1.7.66.Mobility.B.55.2_R10

All up to wikis recommended.