Curly brace shortcut for monospaced text unreliable

In a bullet point list containing inline Java code snippets (mainly method signatures), I attempted to convert the snippets to monospaced font by putting a {{ in front of the snippet and }} afterwards.

Of the 14 method signatures, 5 failed to convert, leaving the braces in the page. Saving the page and re-editing the page failed to fix the problem. The only solution was to use the mouse to highlight the text and choose "Monospace" from the text style dropdown.

There are no apparent differences between the text that worked and the text that failed, e.g.:

FooDescription.isSomething(String, BarDescription)

would correctly convert to monospace, yet

FooDescription.otherMethod(String, BarDescription)

would be left with curly braces before and after (actual method names and 2nd parameter type have been changed).