Cursor jumps around while typing

I'm certain that most of the time I'm nowhere near the trackpad when it happens. (Like 10 seconds ago).

I have this problem with the builtin trackpad and my magic trackpad at home. My MBP has been for service once, I believe they changed a cable between the trackpad and motherboard. No dice. I have wiped the OS and reinstalled from scratch. I have booted in safe mode. You get the idea.

Some days I seriously consider calling it a day and buying a Surface Pro 4.

Cheers

Mark

This 2017 MacBook Pro is my third MBP since 2006. This is a brand new and infuriating problem. There used to be a Systems Preference: Ignore accidental track pad input. That no longer exists. All the suggests in this Discussion area have not worked. This is from my web searching not at all a new issue. There are some solutions for Windows machines, but for Macs? The only fix I've found that actually works, is don't use a trackpad. This of course causes other problems.

On hold with Applecare. After ten minutes this is what I was told:

System Settings>> Accessibility>> Mouse Track Pad>>Turn off the track pad when external mouse or track pad is attached. This is their best option.

It does work-but is far from ideal. I did this last week. What I found was that when I switched to another app, like the browser to look something up, I'll try to use the track pad...but it's turned-off. So this is far from an ideal solution.

This is my third MacBook in 11 years. The other two didn't do this. That's why I think there should be a better solution.

I looked into NisusWriter Pro Menu Keys. If I hit 'Command [ ' it jumps the cursor back to the last insertion point.

That seems to be what the problem is--mostly--. There doesn't seem to be a way to turn this off.

But I'm not doing that. However, if I touch the trackpad and then after, but not during, I hit one of the bracket keys [ ] It jumps back to the last cursor insertion point. I don't think it's just the bracket, because I should be seeing brackets appearing as typing mistakes (that were not preceded by a touch pad touch). I'm not.

Apple Care Senior Advisor said of 'Discussions' "That's not Apple."

Up. Apple Care just hung up on me... not cool. Now if Apple removes this post....

What I would like to find out is. What apps is the jumping cursor doing this? Is there a connection between cursor navigation key-combinations that duplicate these jumps? Maybe it's just the track pad acting like the command key??

OK. I think this is a general hardware issue..but I don't know enough.

However, specifically to my word processor: Nisus Writer Pro I discovered that

1. The cursor was jumping backward in the text to the last insertion point.

2. There is a key-combination for this: Command [ , and to go forward to the next insertion point Command ],

3. I'm definitely not hitting those keys in combination.

4. I can duplicate the issue if I touch the TrackPad, then hit either [ or ] the cursor will jump back to the last insertion point. (It's sequential, not a combination TrackPad touch, (release) then [ or ])

5. The NisusWriter commands are very specific, the trackpad sequence is either bracket.

6. In NisusWriter Preferences >>Menu Keys>>Selection I deleted the key commands for 'last insertion point' and 'next insertion point.' Seems to have resolved the issue in my word processor.

* The first thing I noticed was menus popping, up webpages switching, along with the jumping or crazy cursor. It's taken me three weeks to figure out it's a misfiring cursor navigation keyboard shortcut. I suspect that it might be happening anywhere there are similar key-combination shortcuts. I hope this helps.

If your pointer is jumpy when you use a trackpad, Magic Trackpad, or Magic Mouse - Apple Support

Are you sure you are not touching the trackpad with your hands while typing?