Zeratul's Canons don't attack Missiles in Missile Command [Closed]

I’ve done this week’s mutation (Co-ordinated Defense) with Zeratul default (P0) and P3 (Herald of the Void). His Photon canons are not attacking missiles. This isn’t about PDD’s on Nuke intercepting the canon shots - they’re just not firing at any missiles, even the regular ones. Only his Khaydarin Monoliths are auto attacking missiles, which obviously isn’t enough to take them out. Kept losing my base and wondering why my allies aren’t having that problem. Zagara ally’s spores are attacking, Vorazun’s canons are attacking, Swann’s missile turrets - all attack. But not Zera’s canons.

The only way I could shoot them was with my army and target the missiles. Which is one helluva micro-intensive workaround.

I’ve uploaded one of the replays here: https://drop.sc/replay/15900581

The missiles have polarity too

That’s what I thought at first but it wasn’t affecting my allies (well, I build some canons on their side but they didn’t build any on mine). So I’m still not certain if they’re polarised or not. They’re not marked with a shield hover icon. And weirdly, when some are shot down by my army, a shield icon briefly appears as they explode. Not sure what that’s about.

Edit: yeah, they’re polarised. My canons are shooting at some missiles. Turns out my other allies suck for not building canons/spores/turrets on my side.

Closed, thanks.