Damage events rolling for 65535 appear as 0

Date & Time: 30/03/2020
Frequency: Always
World name: Leviathan
Character name: Nemekh Kinryuu
Retainer name: Naubi
NPC name: N/A
Monster name: N/A
Class/Level: 80 Any that can damage that high
Party or solo: Party
In-game time: N/A
Area and coordinates: Any areas with combat
Housing: N/A

Steps:
1. Be in combat
2. Damage an enemy with actions that can reach 65535
3. Observe as normal, crit, direct hit and critical direct hit floating text is 0, 0!, 0 and 0!!
4. Observe the battle log entry showing the action as doing 0.

After extensive testing and comparing cases where this has happened, I am certain it only occurs at that particular damage value and know that the 65535 damage genuinely happened despite showing up as 0.

This is purely a logging and display bug.

This is likely something to do with 65535 being the max that can be sent in 16 bits (0xFFFF) and that a carry flag is having to be sent to dictate displayed damage and that the only part being taken into account is the 0.
Values below (0x 0 FFFE) and values above (0x 1 0000) are fine but when it's (0x 0 FFFF) it shows as 0.

Why that is will be on whatever is happening under the hood from what the server is sending.

It is possible that it also breaks for 65536 (0x 1 0000) but every case I've looked at has been 65335. It's really, really time-consuming to try and prove this since you have to win the damage roll lottery to get exact values.

Examples for when this has happened:

http://allaganstudies.akhmorning.com...hoenix0Dmg.png

0 damage crit Midare Setsugekka
0 damage CDH Akh Morn

Connection Specs
- Type of internet connection/provider: BT Internet
- Modem maker/model number: BT Homehub 4

■ PC Specs

-=-=-=-=-=-=- FFXIV Information -=-=-=-=-=-=-

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