Site page auto saves and creates multiple duplicates under site page library.

[Ashwin_CH]

I have many subsite/site, issue is with one particular.

When I try to choose a saved template to create a new page, page auto saves which creates multiple duplicates in site page library.
When i click on save as draft It throws error box: 
Changes not saved

We're sorry, we encountered an unexpected error. Please refresh the page and try again.

This is happening when i choose saved templates only and under one specific subsite/site.

Working by choosing blank template does not give any error.
If i try to save as template from the blank page/template save as template option gives me same error as mentioned above.

versioning is enabled  under library setting
server side publishing is also enabled.

note: this is happening with specific subsite/site only and not in other subsite/site within. 

[#2]

Check if your custom template is checked out. If yes, check it in and give it a try.

[#3]

@Bharath Arja Even when the page is checked in the issue continues.

[#4]

@Ashwin_CH 

We are also facing same issue. Can someone help us on this.

Thanks