XF 1.5 Alert balloon is missing

[Sunka]

One user on my forum have problems with balloons for new alerts.
When he read some thread, he get floating notification that he has new alert, but when he refresh page or go to some other page on forum, there is not balloon alerts with number of new alerts.
He said that he did not put mouse arrow on balloons at all.

When hower Alerts link or click on Alerts, he can see new alerts list, but before that, he can not see balloon alerts for new alerts.

I tried to reproduce that, but I can not reproduce it, so Im not sure what will couse that? Any thoughts?

 

[Ozzy47]

Browser, or a addon on the browser. Have the user try on different browsers.

 

[Sunka]

It can not be addon cause it will affect then all users. Browser is latest firefox, but will tell to user to try another browsers too.

 

[Ozzy47]

It can not be addon cause it will affect then all users. Browser is latest firefox, but will tell to user to try another browsers too.

I mean a addon in the users browser, like Adblock etc.