Hello,

We have an Umbraco v. 7.3.4 site based on a regular SQL installation (no SQLCE). We host the application in a regular hosting server (no Azure, no load balancing).

We face the strange problem as it is described below:

Suddenly when we log in umbraco backoffice we cannot see all the installed languages. Also the Culture of some nodes are missing.

After restarting the application (touching the web.config file) everything is restored successfully.

It seems that server memory cached data are broken (or something like that).

Does anyone have any idea of what is going wrong?

View the printscreens below. The first panel represents the regular state of umbraco backoffice and the second panel represents the broken state of the same installation.

----------- Umbraco Missing Culture [Printscreen] -----------

----------- Umbraco Missing Languages [Printscreen] -----------