Netflix is currently testing out a new feature that will play video promos between episodes of a series being watched.

The controversial test was first spotted by Cord Cutters News, after complaints surfaced on a Reddit thread.

According to the post, the video promo appeared full-screen between episodes for other content available on Netflix — both original series titles, and otherwise. The promo displaced the usual card previewing the next episode in the series, and recommended featured content, much in the way Netflix currently does on its home page. Due to a bug, the full-screen promos were not skippable, but Netflix has since confirmed that that was not meant to be the case.

The feature has not been rolled out to all subscribers, instead affecting a small percentage of Netflix’s global audience. Though, understandably, subscribers are concerned about the feature being added on a permanent basis, as the platform is largely praised for having no advertisements interrupting their content.

When asked for comment, Netflix had the following to say to Cord Cutters News.

At Netflix, we conduct hundreds of tests every year so we can better understand what helps members more easily find something great to watch. A couple of years ago, we introduced video previews to the TV experience, because we saw that it significantly cut the time members spend browsing and helped them find something they would enjoy watching even faster. Since then, we have been experimenting even more with video based on personalized recommendations for shows and movies on the service or coming shortly, and continue to learn from our members.

In this particular case, we are testing whether surfacing recommendations between episodes helps members discover stories they will enjoy faster. It is important to note that a member is able to skip a video preview at anytime if they are not interested.

Should the feature continue to prove unpopular with select members, it is unlikely that Netflix will apply it to their entire platform. For most subscribers, the service will continue to be ad-free.