I see the message Not enough tXTR in your available balance when trying to send another transaction while another one is still pending. It is also calculates the fee for a very long time.
I'll try to investigate the loading time.
But about the available balance – I think it's correct since UTXO isn't available to spend until the prev tx is ongoing.
I see the message
Not enough tXTR in your available balance
when trying to send another transaction while another one is still pending. It is also calculates the fee for a very long time.