Flew in on EK511 to DXB and I entered the C concourse (aerobridge and not by bus for a change)

My next flight was EK19 from A concourse.

Thought I'll be in for a long walk/train to A and cleared the security check and entered the C concourse.

Started walking towards the A concourse and reached the far end to see that the concourse is cut off from the others. Had to backtrack through the C concourse security check.

We were put in a tiny minibus and taken by bus to A concourse for another security check to enter the concourse.

Is this something new in the afternoons? I usually connect at DXB around midnight or early AM and haven't transited DXB at this time for a while.