Something popped up. And it had a tick box anf the fedora(?) icon.
I didn't have time to read any of the text before the successfully installed pop-up removed it. The pop-ups happened in this order:
[Do you want to install?]→Installing…→[???]→[successfully installed.]
The first and last pop-ups remain until I click confirm or cancel, the second remains until the progress bar fills up, or installation fails.
Those are the only three pop-ups I've had to deal with on a successful installation.
But this time, there was a fourth one ([???]) that was only up long enough to register it's existance and a handful of details about it.
I didn't have time to read the text, though I think some of it was coloured, though it may have been smaller images. I was able to identify a tick box. There may have been bottons, I don't know, it vanished too quickly.
Since you say you don't have pop-ups, it must be something by Android or Samsung's developers, which complicates things. I was hoping you might have seen or heard of this and had some idea why it happens… Now I highly doubt I'll ever solve this…
Thank you for your response non the less.