The epiphyllum I grow in a ceramic pot here in the picture sprouted many leaves this Spring. But, the leaves are skinny and growing long.

In the picture, there is a normal size mother plant/leave.

I also have another one in other pot, they also grow new leaves, normal size.

I am thinking to repotting this one to a larger pot with new potting soil but worry about root shocks and stop the growth.

Any advice appreciated.