Hi, I had similar situation now. I have booked the place one year ahead where I'm supposed to stay there next year February, since it stated there the place is always in demand. I have also paid 50%. I even recommended my friend to stay there and yes she did as her trip was earlier than mine which was last June. Everything was great she said.
Everything was good and the host did replied until a few weeks ago I wanted to check the calendar of the place to see if there are anyone who booked the place a day before mine so that I can check in early because it was an early morning arrival flight. Then I noticed that all the host listings stated unavailable. I did message her but she did not replied at all for weeks! At her profile page, the review area are all "The host canceled this reservation () days before arrival. This is an automated posting."
Now I am really concern as I have already paid 50% payment. It is also my family's first trip and I don't want to ruin it by needing to find another place on the spot. I am not sure what to do now. You may see her profile here.
https://www.airbnb.com/users/show/102440662
Any guidance or advise is appreciated.