#[0] why what I am posting from one device is not always visible from others? As example my recent answer to https://iris.to/post/note1l9945vz40sw4atkz8d4m2r3kjcw06rt3e76rjv6ed9y73c0p9kksy3wsd0
Discussion
The pic shows how it looks here.

It could be that your other client's relays have not picked it up. Copy the noteid from one client and paste it into the Iris search box on the other and see whether it comes up.
If you're sure that it is published you could try to "Resend to relays" from the note menu.
It could also be that you're not logged in with your private key, you're offline or not connected to the relays. A quick way to see whether you're logged in with your nsec is to see whether the DMs are opening up.
#[5] Id of missing note. And pict of it below. I am logged in with private key on both devices and connected.

Search with Id on the second device returns "looking up message" and never appears. It does on the device I originally posted from. Strange thing my previous answer to you is visible from the second device. It appears messages are picked up sometimes.
For DM another strange thing: on the second device I can see my DMs but not the answer to them!
Using iris web on both sides.
Something curious happening. Message A posted from device D1 was not visible from D1 itself. “Looking up for message” message. Message B posted from device D2 was visible from D1. Then reloaded web page. Now message A is visible from D1 again. And message B was not visible from D1 at first. And then there it is again.