Wikimedia Bugzilla is closed!

When trying to save a statement while the parser request is still in the loop, the value validated by the parser call that returned last (instead of the parser call that got sent last) is saved.
Since the back-end parser is used for string values as well now, a simple test is to press and hold down a key in the input box for a string value and hit ENTER while still holding down the key.
In general, this is a problem when being fast on typing and saving ("fast" in terms of "faster than the API request returns" which might not be that uncommon).