Most states and localities have limits on assessment increases. It’s typically impossible for an assessment to go up by that much in one year.
Assessments usually happen every couple of years. Unless you made improvements to your property, they don't change the cycle.
Ours here are every 5 years, and ours went up 35% ish.
"I believe there are more instances of the abridgement of freedom of the people by gradual and silent encroachments by those in power than by violent and sudden usurpations." -- James Madison