We have created two property as below,

Number 1.

[Display(Name = "Keywords", GroupName = Global.GroupNames.MetaData, Order = 2)]

[CultureSpecific]

public virtual IList MetaKeywords { get; set; }

Number 2.

[CultureSpecific]

[Display( Name = "Content", GroupName = SystemTabNames.Content, Order = 5)]

public virtual ContentArea content { get; set; }

Their behaviour is quite weired, When i query to Content Delivery API, Sometimes values coming and sometimes not...

i can't figure out in which scenarios their behaviour get changed...