VMware vCenter Server 8.0.x
The issue is fixed in VMware vCenter 8.0 U3.
Workaround:
There are two workarounds:
1) Disable ESP Feedback at H5 application level, this will disable ESP feedback on all browsers for all users:
vim /etc/vmware/vsphere-ui/webclient.properties
esp.fs.disabled=true
'true'
service-control --restart vsphere-ui
2) Disable ESP Feedback only on a particular browser:
h5-esp-fs-mode="disabled"