Alright, this is really frustrating and apparently I'm not the only one who's had this issue, but I've yet to find any solutions. Sometimes, while I'm typing something on my phone out of the blue my keyboard will disappear and I have to wait maybe 10-20 seconds before it'll pop up again on its own. Tapping on where I'm supposed to continue typing doesn't help at all.
I read an article - which I can no longer find - stating a few solutions. One of them was a soft reset, but no luck. The other solution was to go to Settings --> Apps --> Keyboard and then clear the cache/force stop. However, when I go to apps there's no keyboard? I've been having this issue since two updates ago.