Confluence guest cannot search in the dedicated space

[Jonathan Porta]

Hello all, 

Recently we decided to create a space for our clients to access "public" documents. We don't want anonymous access so we used guests accesses.

Most of them have no issue but one has a blocking issue as he can't use the native search function. whatever he does, the search return either no result or an error message asking for page refresh.

I've already checked the user configuration and his group, but everything is aligned with other guests.

I've also tried to impersonate him but the search results are irrelevant as it shows me the results of MY account, accessing all the spaces... :-\

Is there something I miss here?