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Unable to read sequence of mappings

See original GitHub issue

gradle dependencies: implementation 'com.amihaiemil.web:eo-yaml:5.1.9'

test source code:

import com.amihaiemil.eoyaml.Yaml;
import com.amihaiemil.eoyaml.YamlMapping;
import com.amihaiemil.eoyaml.YamlNode;
import com.amihaiemil.eoyaml.YamlSequence;

import java.io.File;
import java.io.IOException;

public class b {

    static void readYaml(final String fileName) throws IOException {
        System.out.println("--- " + fileName + " ---");
        YamlMapping root = Yaml.createYamlInput(new File(fileName)).readYamlMapping();
        YamlSequence variables = root.yamlSequence("root");
        System.out.println("Size: " + variables.size());
        for (YamlNode node: variables) {
            System.out.println("Node: " + node.toString());
        }
    }

    public static void main(String [] args) throws Exception {
        readYaml("test1.yaml");
        readYaml("test2.yaml");
        readYaml("test3.yaml");
    }
}

Output:

--- test1.yaml ---
Size: 3
Node: ---
string1
...
Node: ---
string2
...
Node: ---
string3
...
--- test2.yaml ---
Size: 1
Node: key: key1
value: value1
--- test3.yaml ---
Size: 3
Node: ---
string1
...
Node: key: key1
value: value1
Node: key: key2
value: value2

test1.yaml:

root:
  - string1
  - string2
  - string3

test2.yaml:

root:
  - key: key1
    value: value1
  - key: key2
    value: value2
  - key: key3
    value: value3

test3.yaml:

root:
  - string1
  - key: key1
    value: value1
  - key: key2
    value: value2

Expected result for test2 would be Size=3 and 3 mappings, but for some reason the lib finds only one. But If I put single string as first item in the sequence the lib would find all other mappings (test3)