Similar has happened in my area. It's the ming vase thing. I don't know if the claim it's detracting from Starmers social media is fair. There might be a bunch of factors at play.
But I have never known a centralized campaign like it. And I have campaigned for Labour in hopeless seats for years. We always get asked to go to more winnable seats or phone bank, but this time they are literally making local campaigning impossible in our non-target seat. Although locally we think it's at least marginal as the Tory incumbent is v unpopular although it will need a huge swing. But we get no say. Campaign HQ are literally denying us access to internal polling data or social media resources to share and our candidate has been redeployed.
I am trying to be philosophical. I lived through the Corbyn years when the CLP was an even split of Holocaust deniers and single issue voters all on a different single issue. So frankly a bit of campaign discipline is welcome but it's understandable people in Clacton are demoralized
The Clacton candidate is clearly earmarked for a safer seat in 2029, for him winning Clacton wd be a double edged sword as he'd likely lose his seat next time.