The opposite of inflation (when prices go up), deflation (when prices go down) is never a good thing so if we have high inflation say due to global pandemic's

The opposite of inflation (when prices go up), deflation (when prices go down) is never a good thing so if we have high inflation say due to global pandemic's effects on global supply and in response we get say 40-100% price increases (say milk was $1.00/gallon and now it is say $1.50/gallon, a modest 50% increase). so now inflation eases, global supply chain in back to normal etc etc... we should expect now that milk prices will stay forever at $1.50/gallon (or higher) because now that would be deflation if the prices eased…?! :)