Unexpected behaviour of copyStateTo()

[kabanowster]

With version 5.1.0 the method copyStateTo() does a simple fields assignment from one HikariConfig object (A) to another (B) through java reflection. I'm assuming expected bahaviour of this method is to keep config A intact, i.e. as a default.
The unexpected result of field.set(other, field.get(this)); is that object references are getting passed, instead cloned instances.
This means, that changes done to i.e. config B dataSourceProperties (java.util.Properties) are reflected back to config A, which should remain intact. It leads to mixed properties for different sources. Please make it more reliable, or note this within documentation ;)

Here's custom copyStateTo() for config Properties fields:

// defaultConfig.copyStateTo(config);
// custom copy
for (var field : HikariConfig.class.getDeclaredFields()) {
    if (!Modifier.isFinal(field.getModifiers()) && field.trySetAccessible()) {
        try {
            Object value = field.get(defaultConfig);
            if (field.getType() == Properties.class) {
                field.set(config, new Properties((Properties) value));
            } else {
                field.set(config, value);
            }
        } catch (Exception e) {
            throw new RuntimeException("Failed to copy HikariConfig state: " + e.getMessage(), e);
        }
    }
}