Money has been completely manufactured in financial markets already and doesn't seem to be screwing us over too badly. I hardly think UBI paid from taxing the largest economic surpluses and wealth in the history of the world will have a significant impact on inflation.
Any inflationary impact would happen if you print the money supply to pay UBI rather than using existing dollars in the supply.
You're also completely writing off the additional surpluses that people receiving UBI could provide if they're confident they can get by on a daily basis and also ensure they stayed healthy and working rather than spiraling any time one or two things go sideways.