A class action lawsuit filed in the Northern District Court of California blames Apple for knowingly using a flawed keyboard design in its MacBook and MacBook Pro laptops since 2015. According to the lawsuit, several models of the devices manufactured over the past three years have had serious issues with their butterfly keyboard mechanism, which gets jammed with the slightest amount of dust or debris, rendering them almost unusable.

According to a report from Apple Insider, thousands of owners over the years have been plagued by this problem that often resulted in hundreds of dollars is repair charges at Genius Bars or Apple-authorized service centers. The report mentions that in one of the plaintiffs’ case, the repair charge for the damaged keyboard was quoted at a whopping $700. The suit, according to the report, also cites many complaints posted on Apple support forums by disgruntled Macbook users.

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The report of the class action lawsuit comes barely a couple of weeks after Macbook user Mathew Taylor started a Change.org petition, asking Apple to recall all affected models and replace the butterfly keyboard, which has been a constant source of controversy ever since the company gave up on the traditional chiclet design to make way for what has been an inordinately unpopular design choice.

It is worth noting that this is not the only controversy Apple’s MacBook models have had to face recently. Just last month, the company announced a free battery replacement program for the 13-inch MacBook Pro (non Touch Bar version) after finding an issue with the built-in battery on a ‘small number of units’ manufactured between October 2016 and October 2017.