Half history contents only when I forward/reply the message via using Webmail at Domino 6.5.4

Hi all,Our users reported that when she reply/forward message with history to other user by using webmail(R5) at Domino 6.5.4. However, the receiver said that they can’t see full history messages and just read a half. But some users can do that without errors.Anyone can help to solve this problem?Thanks so much.

Regards,

Patrick