Just to Clarify:

Assume I plan to receive Bitcoins from a partner.
When I go in Electrum to tab "Adresses" then I can select arbitrarily one of the green colored 34 char long addresses
(and tell it to the BitCoin sender).

I need not to take the topmost.

And there is no hidden (auto-)refresh of the available green addresses. All green addresses are hard linked to my wallet
and stay alive until I use them.

Correct?

Peter