Send won't follow pan automation?

Hello,

So I am currently working on a mix. I have sent a vocal track to a delay FX track. The vocal track has an automation that has it pan left, then right. However, on playback, the send stays centered at all times. This is very annoying. I have turned on the “link panners” in the channel settings still nothing happens. Any ideas on how to get this working?

Thanks in advance.

if you turned on the “link panners” it is linked from this moment on
but if you already automated panners, this will not link until you write new data for the panners
I guess…