Difficulty using vim within xfce4-terminal

I recently started using xfce4-terminal, and have found that if I run vim in that terminal vim is unable to own the x selection as evidenced by the highlighting during visual selection.  Instead of reverse video, it is grey'd text.  It is also evidenced by the fact that despite having things set up to automatically copy the visual selection to the clipboard, the selected value is no longer available for pasting if vim is suspended or exited.

Works fine from good old xterm, but I'd like it to work in xfce4-terminal as well.

Any advice?

vim version;

VIM - Vi IMproved 9.1 (2024 Jan 02)
Included patches: 1-836

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