Jot conversations disappear

Very strange thing:

1. In spreaded window (Chrome and IE) I can't see the conversations (right field), only conversations list is shown (left field)

2. When I shrink the browser window to "mobile" size I can go into conversation, like in mobile.

3. In mobile and in FF everything works well

Any suggestions? (cache emptied, desktop cleaned,  hands washed :))

Thanx in advance:)

UPD

In Console it wrote that

SdkInitError
reason
:
"MultipleInitialization"
message
:
"OneSignal: The OneSignal web SDK can only be initialized once. Extra initializations are ignored. Please remove calls initializing the SDK more than once."
name
:
"SdkInitError"
stack
:
"SdkInitError: OneSignal: The OneSignal web SDK can only be initialized once. Extra initializations are ignored. Please remove calls initializing the SDK more than once.↵ at Function. (http://mysite.com/gzip_loader.php?file=bx_templ_js_3fb748170283abf6a0c1dc618666552e.js:985:173043)↵ at i (http://mysite.com/gzip_loader.php?file=bx_templ_js_3fb748170283abf6a0c1dc618666552e.js:985:2358)↵ at Object.next (http://mysite.com/gzip_loader.php?file=bx_templ_js_3fb748170283abf6a0c1dc618666552e.js:985:1693)↵ at http://mysite.com/gzip_loader.php?file=bx_templ_js_3fb748170283abf6a0c1dc618666552e.js:985:1627↵ at new Promise ()↵ at Object.u [as __awaiter] (http://mysite.com/gzip_loader.php?file=bx_templ_js_3fb748170283abf6a0c1dc618666552e.js:985:1404)↵ at Function.e.errorIfInitAlreadyCalled (http://mysite.com/gzip_loader.php?file=bx_templ_js_3fb748170283abf6a0c1dc618666552e.js:985:172934)↵ at http://mysite.com/gzip_loader.php?file=bx_templ_js_3fb748170283abf6a0c1dc618666552e.js:985:140952↵ at i (http://mysite.com/gzip_loader.php?file=bx_templ_js_3fb748170283abf6a0c1dc618666552e.js:985:2358)↵ at Object.next (http://mysite.com/gzip_loader.php?file=bx_templ_js_3fb748170283abf6a0c1dc618666552e.js:985:1693)"
__proto__
:

Does it relate to my current problem with Jot? 

If so - how to terminate the double initialization of OneSignal?