(don't forget to enable RBF feature).
The option to enable/disable RBF has been removed since the version 4.4.0 of electrum and all transactions are automatically flagged as RBF.
He supposed not be able to broadcast such transaction because nodes are not accepting a transaction below the purging. I am doubting it that it may be a local transaction.
OP posted the transaction status and according to that, the transaction has been broadcasted by the server.
Nodes can have their own setting and it's not that they all have the same purging fee rate.
Of course, many other nodes have probably rejected OP's transaction and it's possible that the transaction status changes to local once OP is connected to a different server.