This sometimes happens if your Internet speed is slow. Try refreshing the page.
Sometimes it happens due to cache which your browser holds. You can avoid it using hard refresh. Here’s how:
For Chrome users:
Quick hard refresh can be done by using the following short cut keys (Windows/Linux OS):
[+] Hold down Ctrl and click the Reload button.
[+] Or, Hold down Ctrl and press F5.
(Mac OS):
[+] Hold ⇧ Shift and click the Reload button.
[+] Or, hold down ⌘ Cmd and ⇧ Shift key and then press R.
Mozilla Firefox and Related Browsers:
(Windows/Linux OS):
[+] Hold the Ctrl key and press the F5 key.
[+] Or, hold down Ctrl and ⇧ Shift and then press R.
(Mac OS):
[+] Hold down the ⇧ Shift and click the Reload button.
[+] Or, hold down ⌘ Cmd and ⇧ Shift and then press R.
Internet Explorer:
[+] Hold the Ctrl key and press the F5 key.
[+] Or, hold the Ctrl key and click the Refresh button.