Another thing of note, the non-first tabs will not close if you go another page.
Going back with the "back button" after that will not help - the first page in that tab will still close when getting the magnet
So it seems, that only the first page you open in the tab is bugged to close.

i have the same issue.
I also noticed, that the tab doesn't close when getting the magnet link, if it is the original first tab in it's island.

Placing another tab as "first" won't help it stay open - it will get closed, but the original first tab will stay open even if you move it to a different spot in the island.

If you close all other tabs in an isalnd and leave only:

• the original first tab - it will not get closed when getting the magnet link
• any other tab - it will get closed when getting the magnet link