Hello Akshay,
Please take a look into this note, this may be helpful.
2066406 - Time out error after 30 minutes when saving data through an input form in EPM Add-in
And one more question is it for one layout or for all layouts...?
please share your error log message also check ST22 and SLG1 whether is there any shot dumps available or not ..
Regards,
Saida Reddy Gogireddy