Here is the Palestinian population for every years since 1997, according to the Palestinian Central Bureau of Statistics. I added a column to show the increase in the population each year, and then a percentage increase.
Notice that in 2018, the increase jumped from the roughly 101,000 of the previous 10 years to over 120,000.
A steady decline in population increase suddenly spurted from 2.19% to 2.55%, and stay around there since then.
Here you can see the jump in a chart:
There was a census in 2017 which might account for this, but from
this source it says that the census came out lower than PCBS estimates - which are not reflected in this table.
Something strange is going on.