BTW, there is a problem with GUI of the wallet (version v0.16.3.0-2edec369aminki)

Be careful, this issue will make you lose your money

Steps to reproduce:

• 1 go to the send tab
• 2 send money to an address (select it from previous used addresses)
• 3 repeat steps 1 and 2

The first sending goes right

But when you do the second sending (step 3), and for each subsequent sending,  it shows the right destination address, but when it makes the transaction the address becomes NULL.

So it sends money to an empty address and the DTCs are lost forever.

The issue does not occur sending money from command line, so it is a GUI related problem.