It wasn't, actually, sufficient precaution to prevent Iomedae from perceiving the event, when some of Her faithful thought that Keltham had given them the key to victory over Evil in Golarion and maybe even many planets beyond. Trying to suppress your emotions, and not think too excitedly about that prospect, doesn't actually avert Iomedae's attention. She's not the goddess of being excited about victory over Evil. If you're just going to do it and not get excited about it, that counts too.
But Iomedae is being careful in how She updates on that leaked observation If Keltham is honestly trying to give Her church a great aid in its purpose, despite what he sees as a risk of that act triggering Iomedae to some unwanted-by-him action or realization - but he is daring to help anyways for Goodness's sake - then Iomedae will... just let Keltham give Her people that gift? And not let that trigger any adverse actions by Her, unless She'd have arrived at the same conclusion by another pathway, so that Keltham is not disadvantaged by his goodness? It's frustrating to Her how often Good seems to feel the need to treat adversarially with Good, but She at least knows better.
Her splinter doesn't fail to note that Keltham's attempted concealment of his gift seems possibly related to Cayden Cailean shutting down Iomedae's spying apparatus in Cheliax. But even having observed this, it doesn't fall into an obvious greater abstract pattern for why. Why would Good fight Good instead of negotiating?