Only 20 notification endpoints can be displayed

OS: centos7(Linux 3.10.0-862.el7.x86_64 x86_64)
Qestion:It seems that only 20 notification endpoints can be created.When I create the 21st notification terminal, I can’t find it when I refresh the page.When I delete the 20th, the 21st shows up.It seems that the front end can only display 21 notification endpoints.
Excuse me, do I need to do any settings?

Hello @Kai_He,
Out of curiosity, can you create another notification endpoint with the API?

This is odd. I am not aware of any limits.