Sync Session Token Expired in iOS AWS cognito SDK

AWS cognito SDK is throwing error that sync session token expired. Dataset sync get affected due to this error.

• AWS Cognito SDK version - 2.6.35
• iOS Base SDK version - 13
• Encountered this issue in iPhone XS Max, iPhone X, iPhone 7
• dataset.synchronize().continueWith(block: { (task: AWSTask?) - Facing issue in this method.
• Issue gets resolved only if the user kill the app manually and relaunch it.
• This issue is inconsistent.