Problem with mod_shared_roster

I've just installed ejabberd 17.06 and it works perfectly, but... suddenly, my Spark client began to reconnect again and again, writing these lines y mi ejabbers server log:

2017-08-02 12:31:51.588 [warning] <0.1126.0>@ejabberd_c2s:process_info:246 got unexpected info: {item,{<<"user">>,<<"server">>,<<>>},both}
2017-08-02 12:31:51.588 [warning] <0.1126.0>@ejabberd_c2s:process_info:246 got unexpected info: {item,{<<"user">>,<<"server">>,<<>>},both}
2017-08-02 12:31:51.588 [warning] <0.1126.0>@ejabberd_c2s:process_info:246 got unexpected info: {item,{<<"user">>,<<"server">>,<<>>},both}
2017-08-02 12:31:51.588 [warning] <0.1126.0>@ejabberd_c2s:process_info:246 got unexpected info: {item,{<<"user">>,<<"server">>,<<>>},both}
2017-08-02 12:31:51.588 [warning] <0.1126.0>@ejabberd_c2s:process_info:246 got unexpected info: {item,{<<"user">>,<<"server">>,<<>>},both}

I've read about the mod_shared_roster has any bug

But if I quit that module of my ejabberd, I can't see the created groups.