Range query not working

i have this structure
settings: {
minimumDuration: 168
minimumDurationSeasons: {"S1":120,"S2":168,"S3":240,"S4":336}
minimumStart: 168
openDays: {
monday: true
tuesday: true
wednesday: true
thursday: true
friday: true
saturday: false
sunday: false
}
}

and i want to use range filter
{
"range": {
"minimumDuration": {
"lte": 72
}
}
}

but it not working.
The field minimumDuration is an integer field.
When i set lte to 167 it works.