Zoa shrinking…?

[Ironlink1000]

Hello fellow reefers! I have a few colonies of zoas which are doing amazing but one particular zoa has been getting smaller rather than bigger despite other corals showing no signs of stress… change in lighting is due to the lens I’m using not the actual light. Bluer photo is before, whiter photo is after.

 

[TokenReefer]

Bluer photo is before, whiter photo is after.

The zoas on the left look like they've grown out a bit more and the ones on the right look like they're a little upset about something. Hard to say anything beyond that without more details, sorry

 

[Ironlink1000]

Is there any info that I can give that will help diagnose?