SearchMessages misses the latest message

[Nevershot]

Why the SearchMessages method returns one less message than expected. I sent Q1, Q2, Q3. FoundMessages.totalCount = 3, message[Q2, Q1]. If I send a message Q4 FoundMessages.totalCount = 4, message[Q3, Q2, Q1]. If I send a message Q5 FoundMessages.totalCount = 5, message is[Q4, Q3, Q2, Q1]. The problem is not the limits. Can you please tell me how to solve the problem and how the "query" works? I always send a string with a space " ", but if I send an empty string "" it stops matching.

        TdApi.FoundMessages foundMessages = client.sendSync(new TdApi.SearchMessages(
                new TdApi.ChatListMain(),
                " ",
                "",
                10,
                new TdApi.SearchMessagesFilterEmpty(),
                null,
                0,
                0
        ));

Version: 1.8.50