This is Google at it's worst. Chrome is a google browser and you are probably using it at work, unknowingly logged on with your google account. Your android (Google again) tablet requires you to register with google before it will work. Google then added 2 and 2 together and linked your tablet to ukp.
Always browse in private mode as the others have said above. Personally, I would avoide Chrome like the plague. Firefox is good on a PC. I don't know what is good for an android tablet, but if you search on browsers with private mode (preferably with pin protected access) you will find lots of choice.
And finally, browsing ukp on your work PC !! Unless you are self employed, this seems inordinately risky. You know that corporate IT departments track your browsing history don't you ?