Consumer Reports testers have confirmed that Samsung’s new tablet—the Galaxy Tab S5e—has a WiFi issue, caused by the placement of the device’s 5GHz antenna.

As a few review blogs have pointed out, when you hold the tablet in the landscape position, it’s easy to place a finger over the antenna, blocking the WiFi signal.

That makes it difficult for consumers to do things like conduct Skype calls, stream video from sources like Netflix and YouTube, and play video games on the $400 tablet.

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Richard Fisco, who oversees electronics testing for CR, urges consumers thinking about purchasing the tablet to wait until Samsung publicly addresses the matter, which was first reported by SamMobile, a popular Samsung-focused blog.

The manufacturer has not yet responded to a Consumer Reports request for comment.

“When your skin is touching both sides of the antenna built into the case, the signal goes down,” says Antonette Asedillo, who oversees CR’s tablet and computer testing. In our labs, the 5GHz WiFi speeds fell from around 150 megabits per second to 40 to 50 megabits per second.

The antenna on the Samsung Galaxy Tab S53 tablet
The antenna—beneath the white stripe on top of the Samsung Galaxy Tab S53—is easy to block with a finger.

The other WiFi connection at 2.4GHz speeds—which are tied to a different antenna—appear to be fine. In general, says Fisco, that signal tends to be slower than the 5GHz one and more susceptible to interference from other routers and devices, particularly in crowded environments like apartment buildings.

If this truly is a hardware design issue, it can’t be fixed with a software or firmware update, Asedillo says. But you may be able to correct it by placing the tablet in a rubber case. In 2010, in the midst of a similar design flaw problem dubbed “antennagate,” Apple gave consumers free “bumper” cases for the iPhone 4.

Cases for the tablet, however, are not yet widely available at retailers such as Amazon and Best Buy.

The Samsung Galaxy Tab S5e in the hands of a tester
When you hold the Galaxy Tab S5e in this position, your left thumb easily covers the antenna.

The tablet’s connectivity issues come at a sensitive time for Samsung, which was forced two weeks ago to delay the highly anticipated release of the Galaxy Fold smartphone due to screen problems uncovered by reviewers. And three years ago, Samsung had to recall the Galaxy Note 7 smartphone over a design flaw that led to battery fires.

Subsequent Galaxy-branded smartphones scored very well on Consumer Reports’ tests, including the Galaxy S10+, which is currently the top-ranked phone in our ratings