AS923 - Dwell ON not working

Hi, I am trying to use AS923 configuration with DWELL management activated.
Lines in toml:
uplink_dwell_time_400ms=true
downlink_dwell_time_400ms=true

I see the request but dwell are set to 0:

Someone already test this ?
Thanks.

Problem solved, I re-generate a new config file and modify things in it and it works now.
Maybe I had an issue in previous file.