I'm not sure how this works in the US, but in other countries there are laws against such increases in rent - especially 'social' rent for those with low income.
The first world country I'm from has, effectively, nation-wide rent control (varies by region) and rent increases are limited to something around 1%, set each year (tracking inflation somewhat).
In the US, this will work very poorly: a landlord can just bump your rent by exactly the UBI amount and get away with it. Otherwise, they would have to wait for a vacancy to set the rent. But eventually, I agree that the rent would just absorb the UBI in many cases.