EndPoint in SM1, no visible by Coordinator during 10s after wakeup ?

Dear,
it’s seem one endpoint in hybernation for example 2 minutes, when wakeup, it’s not visible by coordinator during more 10s ? It’s True ?
Best regards.

If Coordinator has removed End Device from its child table, then it may take few seconds for End Device to find and associate with parent node.

However, this situation can be avoided by by providing SP and SN value on coordinator & routers such that its equal to max. sleep period of child node. This way, removal of End Device from parent’s child table while its asleep can be avoided.