"not function as intended" is correct and usable in written English.
It means that something did not work or operate as it was supposed to. Example: The new software did not function as intended, causing many errors and delays in the project.
A formula clause that splits assets between nieces and charity will not function as intended.
Some areas are greatly over-exploited and such irrational land exploitation has been persistent; (2) related national land plans designed to guide land exploitation efforts centered on resource-rich regions and critical areas do not function as intended.
In this time the system will not function as intended because its knowledge of interface positions will be incorrect.
In particular, the agency is concerned with apps that could pose a risk to patient safety if they did not function as intended.
If this 'chain' (I V) is not solid in each of its links [17] the system will not function as intended [13].
The Rasch analysis also revealed that some of the SF6D items did not function as intended.
Earlier this year, Apple promised it would clean up its iOS App Store by removing outdated, abandoned apps, including those that no longer meet current guidelines or don't function as intended.
Early on in the intrusion, warnings were not relayed properly to agents inside the White House building because alarm systems and radios failed to function as intended.
True, without interference, they can function as intended.
Despite being created in 2004 as a post-9/11 intelligence reform the board has not done any substantive work until this year, struggling with independence from the White House and persistent vacancies that have left it unable to function as intended.
Before the site took it down, the unusual item was described as "not functioning as intended and not fully operational".
