I get this problem too; seems to be for words I did with voice-to-text. They get underlined so if I click them, I get the alternative choices, and of course, behind the keyboard. Even worse for google voice keyboard, cuz now the 'X' wont even close the keyboard so I can see the choices. I'm still looking for solutions, but I have a couple weird workarounds for now, that get me by.
1) My front touch buttons have qslide apps & when the word-suggestion list is behind the voice keybd, I can click the qslide-apps-front-touch-button, the qslide app choices appear, the google-voice-keyboard goes away and the wordlist stays, then click qslide button again, and everything goes away, but the list stays. Of course, the back button would have gotten rid of the google-voice-keyboard, but the list would have disappeared too. If the list isn't present, the X on the google-voice keyboard "does" work.
2) Another limited option, is "IF" you can stick with the swype keyboard with dragon voice-to-text engine, which isn't bad, the whole problem never happens for me in the first place, but also avoids google-voice keyboard at that point. I like google's better, but...
3) I'm really looking for a solution that will just get rid of the word choice list in the first place and hopefully "without" rooting the phone.

It's hard to know if the whole problem is LG using a list created by Google-voice-to-text w/ a bad implementation or if it's Google itself doing the dropdown list; Idk.
4) Also, It all works beautifully with the drop-down list, the keyboards (whichever you use,) and google's voice/text keyboard, when it all occurred out of Facebook Messenger's chat-head chat window, I think because it's some kind of popup window, with the word-list suggestions being a popup, they come up over the keyboards suddenly and the the Back/X buttons work great. Only app it all works good out of the box, I've found.


