The Message buffering feature initially introduced in the Server SW release 3.1 has been really improved with the Server SW release 3.2.7 and Gateway FW release 4.3.3.

Now, there is a new field called “Gateway received time” displayed in Dashboard for the DataUp messages. Care, this field is different from the field “Date”.

• Gateway received time: is the reception timestamp on the gateway.
• Date: is the reception timestamp on the server when the message has really been sent by the gateway.

So there is a change in dashboard, see screenshot below:

Note that the push API has been also altered by the adding of this new field:

_msgid: "e344928a.5b315" 
payload: object 
id: "5fe0c751cab20b0001a5d36e" 
endDevice: object 
fPort: 2 
fCntDown: 1
fCntUp: 8
adr: true
confirmed: false
encrypted: false
payload: "0027420878ff883944c2e2fe646a005a"
encodingType: "HEXA"
recvTime: 1608566609168
gwRecvTime: 1608566609168
classB: false
delayed: false
deviceEui: "343737397633690B

Refer to the page FAQ: Message Buffering to know how to enable or disable Message buffering feature.