Keyboard add random Period while typing in certain apps or websites

There is a setting under System Preferences>Keyboard>Text to turn on adding adding a period with a double space or not. I'm guessing yours is on.

Mine is turned off. Now the system adds random double spaces. I suspect we have the same issue here.

I have filed a bug report with Apple but no response yet.

I am having the same issue. Just started yesterday. I also have a new 2018 MacBook Air-- so far I have gotten it to stop happening by unchecking "add period with double space" in settings/keyboard/text, but I am concerned that this may mean I am developing keyboard issues-- unintentional double spaces...? Hopefully it's a bug with Mojave....

This is the response I have received from Apple.

It’s a known hardware issue, and our hardware team is looking at solutions for future models. Currently, there is no software fix to address this. We are closing this bug report. If you have questions regarding the resolution of this issue, please update your bug report with that information. Please be sure to regularly check new Apple releases for any updates that might affect this issue.

My plan is to have my keyboard replaced under warranty and test again against the latest beta. If the issue persists then I will re-open the bug report.

Also I do not think this is a hardware issue. It showed up when I was using 10.14.3 beta. I reverted back to 10.14.2 and keyboard went back to normal. Testing again with the new 10.14.3 release the issue showed up again.

I am sorry to hear this, actually, as I have been hoping that the butterfly keyboard issue wasn't going to be a problem with the new MacBook Air. At the moment I have turned off the keyboard repeat settings, as well as the double space period setting, and am only occasionally having the random double-space issue. If it gets worse, I will submit a trouble ticket, and get the keyboard repaired. Inspired by the email you shared, I have also signed up for Apple Care +, which I hope will make it easier to fix problems if they continue to develop. Please keep this thread posted-- I'd love to know if the problem persists after both of you replace your keyboards. 😊

I went in to the Apple store today. They ended up cleaning the space bar. So far so good. I am not sure exactly what was lodged underneath. The Apple Genius said that sometimes dust gets stuck and you just have clean around the edges.

My recommendation. Get a compressed air can or very small (but not sharp) instrument to clean around the space bar.

The good news is that it is a simple fix after all.

@Mohannad, could you clarify: do you also have a MacBook Air 2018 model? I just dropped off my computer to be repaired, and the technician said that the new MBA's are not having the butterfly keyboard issue, even though some of them clearly are-- you can tell if you search the internet! I will report back to let you all know what they did, and whether the issue is fixed. Typing now on my ANCIENT MBA (2012) that has never given me any trouble. :(

I have a 2018 Macbook Pro. Although I believe it's the same keyboard (with the new membrane covering).

Are they refusing to repair it? Technically mine wasn't a repair. He just said he cleaned underneath it and try it out a bit longer. If the issue persists then they would replace it but it takes about a week.

 No! They will definitely repair it. But at the moment they are treating it as a personal issue to me, not a general problem with this kind of keyboard. I tried to point out that the keyboard on this computer is the same. They were not really on board. I’ll let you know what they say. Seems like some MBA 2018 are affected so far but not as many. Thanks for updating. 

Just wanted to update that I picked up my computer today-- they replaced the top case, which the technician said is the part of the computer that has the keyboard. It's working beautifully at the moment. I will report back here if I start to see problems again.

MacBook Pro 2018. About 3-4 months after buying I started getting random double spaces. Tried all the "fixes" in Settings to no avail. Threads indicated hardware problems.

Sent to Apple Service. "We couldn't find anything wrong on testing." Sent back to me with "latest firmware".

Been using it about one month. What do you think? I am not putting in double spaces fun. I am not a happy camper.

Seeing all the double spaces in your post the issue is clearly there. I pulled up TextEdit in front of the Apple guy and literally alternated the letter s and a space over and over till it happened in front of him.

For me though, the solution was simple, clean under the space key. You might just get some compressed air and try that first.

I wish. They did that at the local Apple Store to no avail. Now I am getting a serious number of random periods in my typing. None now of course but I typed in Notepad and was able to easily repeat the problem for the Senior Technician. Now tomorrow I get too talk with an engineer

The periods and extra spaces are part of the same problem. If you go under System Preferences>Keyboard>Text there is an option on the right side to "Add period with double-space". If it's checked you'll get extra periods, if it's unchecked you'll get extra spaces. In either case it's an annoying issue.

Seems to me they will have to replace your keyboard.

Experiencing the same thing on my 2018 MacBook Pro running MacOS Mojave 10.14.2 (18C54). Super weird glitch and no pattern to it that I can tell, the randomly inserted period is happening in Gmail, G-Drive word document and Facebook. Have also unchecked "add period with double space" in settings/keyboard/text but when the period is dropped into my text it doesn't seem related to space bar usage. Hope Apple sort it out soon, it is an irritating feature!