Property tax appraisal value had a 20% increase for condo – Harris county. Is this normal or happened to others?

HCAD appraisal value had a ~20% increase from last year. I have a 2B2B condo where the last year appraisal value was ~$155K and it went up 20% this year. I haven't made any upgrade and or anything. My downstairs apartment only increased ~$2K and is still significantly less than my valuation.

Is this normal or others facing same issue?

I will protest but not sure how much it will go down. This hike is absurd.