`:wrap` does not respect `:when`-condition

[Perangelot]

Expected behavior

After defining two sp-pairs with the same :wrap and trigger but different parens-pairs and disjunct :when condititions, the :wrap keybinding inserts that pair whose :when condition returns t.

Actual behavior

The :wrap keybinding always inserts that parens-pair which was defined last.

Steps to reproduce the problem

To your config, add

    (sp-pair        "\\textit\{" "\}"
                    :when '(sp-in-string-p)
                    :trigger "ital "
                    :wrap "C-S-k")

    (sp-pair        "\\mathit\{" "\}"
                    :when '(sp-in-math-p)
                    :trigger "ital "
                    :wrap "C-S-k")

1. Open an org-file.
2. Select some text wrapped in dollars signs and press C-S-k.
3. Select some plain text and press C-S-k.
4. Observe that in both cases, the pair "\mathit{" "}" is inserted.

This problem is OS- and version-indepdendent.