UBI is just a concept, you'll have to look at some person/organizations specific implementation to figure this out. Try googling "Andrew Yang" if you want an answer to see how a current presidential candidate is tackling this.

Inflation would be very welcome right now. Zero interest-rate policy (ZIRP) seems to be the new normal, and I believe its largely due to increasing wealth inequality which is creating deflationary pressures in our economy (the wealthy can only consume so much, most of their money goes into savings).

Also hyperinflation seems very unlikely with the amounts being discussed. Under an ideal UBI. Existing welfare programs would get replaced with the UBI, so that would have a neutral impact on the economy (and if UBI eliminates the welfare trap it could actually be a positive for the economy). The UBI would be a net benefit for those that are currently severely under-employed or unemployed but don't qualify for any welfare programs. But the UBI amounts proposed are fairly small, so would likely only result in a very small increase in demand for food and housing. And we have more than enough food surplus, and plenty of housing surplus in poorer areas of the country that this seems like a non-issue.

[1] https://en.wikipedia.org/wiki/Zero_interest-rate_policy

Too high a UBI might lead to inflation. In that case, if we've indexed UBI to observed or predicted inflation we could indeed wind up with a positive feedback loop and hyperinflation.

So don't do that. Index to targeted inflation. If it's too high and we see more inflation than targeted, the UBI will fall in real terms. If inflation falls short of target, the real UBI will increase. Negative feedback loop - probably stability or oscillation.

UBI is not necessarily inflationary in the first place.