Annoying Android app (Untappd) problem. Help plz

I have this odd problem with Untappd on my Android phone.
(Untappd is like a facebook for beergeeks. You share and rate the beers you tasted, comment, etc.)

Every time I use the manual search function it adds a word to the one I typed.
At this moment its "ik" (Its Dutch for I / me), wich is always highlighted.

So searching for barrel space aged space results in "barrelik agedik"

• Untappd is the only app this happens to.
• I deleted and reinstalled the app without succes.
• I've been using untappd for multiple years, never had this before
• Its been going on for a couple of weeks, not sure but possibly after an app update.
• Reset setting in the Untappd app, nothing changed.
• When I delete the word " ik" from the history the same will happen with the next word in line (see 2nd pic below).
• These words in line come from my Untappd history, I used them describing a beer).

Btw, I'm unwilling to reset my phone because of this. Like I said its only Untappd with this problem. ;)

I made some pictures....

here you see me typing barrel, you see "ik" highlighted at the bottom for some unknown reason:
Then I hit space because I want to add a word to my search.
This happens
Me every time this happens

Its probably something with the app itself. I contacted them but they havent replied (yet).
Maybe, just maybe, someone else here has an explantion or a solution.

Thanks for reading

Not expecting a solution, just wanted to vent my anger ;) I'll be allright btw

EDIT:
Got a reply from Untappd: I apologize for the inconvenience. This is something we have been experiencing with third-party keyboard applications on Android devices. Unfortunately, we do not support third-party keyboard applications - but we have heard word that there should be an update from the application provider in the next week or so to help remedy these issues.