Cannot rename VM in vSphere Client

Due to a quick refresh on vSphere Client, I am not able to rename my VM. When ever, I click on the VM, hit F2 and type the new name, the screen does a refresh and I am not able to rename the VM.

I can just type on the notepad and do a quick cut and paste but I would like to know, how can we stop/avoid/fix this behaviour of vSphere Client.

Thanks