Someone says[...]
Another person said[...]
And would you rather believe random strangers on the internet, rather than me ?
(yes, I'm just another one)
Just for your sake I tombstoned SB9 on one of my Nucleo (F042), and proceeded to program it (using OpenOCD/gdb and also drag and drop).
No problems, programming and debugging.
In fact, when I use my blackmagic probe or ST-link, I never connect the reset...
Yes, using Vin will work, too, but it's clearly making it work out of specs.