Session Settings: Impossile to post content after Session Lifetime & Unable to load tooltip content

Hello.
I have this settings in backend:

Session Handler: Database
Session Lifetime: 10 min
Shared Sessions: No

What settings you recommend to use?

1) login to site and do something
2) don't logout. just do nothing in 10+ minutes. Or hide the browser.
3) return to site after 10+ minutes
4) type or comment / type private message or upload photos to stream (uploading successefull), or add linked video.
5) press "Publish / Send / Post" button/
Result: I can see notice message. For example (more at the screenshot):

JSON Parse error: Unexpected identifier "Invalid"

SyntaxError: JSON Parse error: Unexpected identifier "Invalid"

Unable to parse server response

or empty notice.

Also notification module display "Unable to load tooltip content." after 10+ minustes:

COM_EASYSOCIAL_POPBOX_ERROR_UNABLE_TO_LOAD_CONTENT="Unable to load tooltip content."

Usualy I get this notices on mobile (iphone 6, safary) after 10+ minustes unactive. And didn't tested good on PC.

So I have to refresh page before post anything.

Thanks.