Log Analytics workspace:TimeGenerated value Current time for less than 48hrs logs(From current time)

In azure portal, In log analytics workspace, we have DCR Based tables, in which we have TimeGenerated field which we set as part of body and inject using folllowing python call-
client.upload(rule_id=dcr_immutableid, stream_name=stream_name, logs=json.loads(body))

For TimeGenerated field which contains value less than 48hrs(from current time), for those logs it sets current timestamp. (It works for last 48 hrs TimeGenerated)

Expected behavior should be TimeGenerated value should accept all values.