Template rendering issue while checking in the Litmus

Dear community Advisers,

I am facing some issue while rendering the Email template in the AJO.

Everything is fine except one white line coming in between two fragments in the template. This is not in all devices only few devices. Mostly window devices

OL Office 365 (Win 10)

Outlook 2019 (Win 10)

Office 365 Dark (Win 10)

Outlook 2021 (Win 10)

Outlook 2021 Dark (Win 10)

Is there any code or else any other way solve the issue. it would be great help to me if the problem is resolved. 

Regards

Satya