Glare is not working in the render image

In the blender view in cycles I see the glare view I put, however when I go to Render Image this does not work well in its entirety or almost nothing, I tried to move my nodes or add a view node but still does not work.

It’s happening to me with several files, I’ve even tried to exaggerate the glare to make it noticeable and still nothing

-Value must not be used.
And in the preview of the view, Glare doesn’t come out exactly.

It looks somewhat similar after one rendering, but it’s only a reference function.

The final result is that we applied it directly to the Composing node after rendering.

Add…

How to get the results you want from Composing.

Are you using the realtime compositor? The glare algorithm used in the Glare node isn’t feasible at speed in the viewport, so the glow you see in the realtime preview is a different implementation, closer to the Eevee bloom. This is considered a stopgap solution for now by the devs, they’re working to unify them, but for now, you’ll have to work with the node bloom, doing test renders and adjusting your settings as needed (like adjusting the threshold, or making your materials brighter), or re-run your rendered image back through Eevee to get bloom in a second pass.

In Blender 4.2, make sure you have GPU enabled in the options tab in the compositor. I was having the same issue, and switching to GPU solved it. Hope it helps!