NSA 4600 - dropped packets for invalid TCP Flag #1

Getting some dropped packets on the sonicwall with the below error
any idea what could be causing this.
DROPPED, Drop Code: 70(Invalid TCP Flag(#1)), Module Id: 25(network), (Ref.Id: _5712_uyHtJcpfngKrRmv) 1:3)
Seen this but not resolved the issues (noticed the flag is #2 not #1)
Category: Mid Range Firewalls
0
Answers
This is on a NSA 4600 with firmware ver 6.5.4.8-89
Hi @UTCTech ,
Can you please follow the KB below:
This article describes how to workaround the drop "(Invalid TCP Flag(#2)), Module Id: 25(network)" due to network issues.
Regards
Nevyaditha P
Technical Support Advisor, Premier Services