Reload Statistics Entities doesn't work

Configuration
1

I’ve been adding some statistics into my config and using the Reload Statistics from Configuration > Server Control. If I add a new statistics entry in my config it loads the entity and shows under entities but doesn’t gather any data. All current statistics entities break as well and stop displaying data. If I do an HA restart then everything works.

Is this a bug or what?

2

I have the same Problem.
After Reload all Statist Entitys will become State unknown
After restart Homeassistant, it works.

3

I have the same problem.