Jatin B

Check logs on server at that time,if you are you using an shared server, limited resources plus multiple times background cache can cause a similar issue.

if you do not have server access

check your error email.

you would have gotten an email with error code and issue with code.
something like issue occurred with line xxx in file lame.

thats the main issue.
You need server access to disable all plugins one by one, and check if issue is solved.

you can set a password and share the page with password

• you can install plugin to hide title on pages.
  
• check right side and n the editor page, if your theme already has this feature to hide page title.
  

you have two options

• Transfer subdomain to owndomain.
• mask sub domain with own domain. ( in address bar it will show owndomain) – not recommend for seo

Permalinks setting

• Go to?Settings?>?Permalinksin your WordPress dashboard and click save.
  this should solve the issue.

dear jeremy , thanks for your reply

after reading this, i have made 5 post on twitter but image was not shown

and also i post an new post which is an “image type post”
consist only of a image, but NO image is shown on twitter
brainwalls.com is my domain where post are posted
and @brianwallsbw on twitter

i still can not see this feature .. plese tell if i am doing some thing wrong

regards
Jatin

i completely agree with you #eagereyes, #jetpack with this feature will be much cool, i wish you could add it ,