OCaml mode : \t (type display) doesn't work as expected

Hello,

I'm programing in OCaml and would like to use the "<LocalLeader>t" functionality that normally displays the type of the selected term. I activated annotations files, and the function seems to be called and to return the good result. My problem is that the result is displayed too briefly to be read (it just appears sometimes, so I know that the function somehow works, but it is not usable at all). In the plugin, the type is printed with an "echo" command. When a message error is displayed (e.g. there is no .annot file), it stays on the screen; should I conclude that there is a bug with this functionality ? Could it be a bad configuration coming from me ?

Any help would be appreciated.

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