I'm happily out of touch with markets for another month or so, so this will be out of date. In short, part of the market fears a deep recession, so their prediction is for much lower bond yields, which pushes current bond values higher. I think Goldman Sacs compared the situation to a "hurricane" on the horizon, and they backed up their belief by keeping their stock dividend unchanged while other banks increased theirs.
Besides the "deep recession" camp, there's "mild recession" and "soft landing" views of the market, each represented in stock & bond prices. Some think the Fed will cause a recession, but it will be mild (based on strength of the consumer & savings). In the Fed can pull off a "soft landing", bond yields would be stable, going up with Fed funds rate increases, and then back down when inflation falls.
I don't understand the drop in mortgage prices you mentioned, but I don't follow them at all. On CNBC's Halftime Report I heard Josh Brown say new housing starts "fell off a cliff" a day or so ago - which is the only financial news I've watched in a week. If demand for mortgages is falling, banks might be competing on price. I don't know how far that can go - each Fed meeting pushes up the Fed funds rate, which I expect drives up mortgage rates.