Describe the bug
The Gui does not display mail when opening sometime, closing and reopening multiple times temporally fixes it.

To Reproduce
Use the hotkey or command to open the mail a few times.

Optional:

https://imgur.com/a/KFkAfw3

Hello
This is spam protection from the client by requests for data synchronization. When you open most of the menus, the data is updated and synchronized if necessary. The cooldown of synchronization is 2 seconds.
So you can open menu only once per 2 seconds.