From the article, any coastal ‘gain of land’ came from human construction of islands, in Dubai and China. More net ‘gain of land’ came from inland drought and loss of reservoirs due to irrigation and water use by cities.
Loss of land is still caused by melting glaciers and polar ice.
The article appears to say that ice and glaciers are still melting and water is moving in surprising and destructive ways; with rising sea levels around the world, melting inland glaciers, and increased storm damage.