Recently WhatsApp users have started seeing a message during chats (mostly noticeable during group chats) which reads

Waiting for this message. This may take a while

Why “Waiting for this message.This may take a while” appears in whattsapp

you are member of some very active WhatsApp groups and you turn on your Mobile Data / WiFi after few hour gap you would be flooded with group messages but messages with very littletime difference would lose its integrity and it would not appear as how messages are sent
depending on message size (long text vs short text) .

To rectify the issue WhatsApp launchedthe above message “Waiting for this message. This may take a while” as a placeholder, so that the integrity of messages is kept and you get the Group messages in the way they are sent.

How to Fix “Waiting for this message.This may take a while” error

this is not an Error, and there is no Fix per say .but the last beta update of WhatsApp to version 2.16.150fixes an issue where the “Waiting for this message this may take a while” would take forever , now it quickly loads the chat and upkeep the integrity of chatFun Note : Previous beta version had a
spelling mistake and they wrote “Waiting for this message.This may take awhile” instead of “a while” , can’t handle the updates ?😛