Where to move money for a house purchase that has been delayed.

I've been saving for a down payment on a house but now it does not seem it will happen for at least another 3-4 years. I have all that money in TFLO (Treasury Floating Rate Bond ETF) but I know I'm loosing money because of inflation. I've look at TIP and STIP but I already got burned when the Feds increased interest rates. Also, I've looked at FDHY and it seems like a good choice but it does have some volatility and if I need the money and it drops, I'm screwed. Any type or category of investmen