Do you know if this issue has been fixed in 12.4.1 or 12.4.1 update 2?
There is no 12.4.1 update 2 - perhaps you mean 12.4 update 2 ?
Both 12.4 U2 and 12.4.1 fix the above.
However, there is a new NAT / HTTPS issue in both of the above.
12.4u2 NAT Issueshttps://community.watchguard.com/watchguard-community/discussion/comment/523#Comment_523