Still seeing black line underneath footage 2944x2172 Arri SXT

I am new to the arri workflow and I would like someone to shed light as to why I am still seeing a black line at the bottom of my 2944x2176 footage after bringing it into premiere, interpreting the footage to anamorphic 2.0, and then placing the footage into a 2880x2160 timeline?

Thanks,

Taylor