[Mac] Moving Mouse diagonally causes extreme lag/slowdown as soon as game is opened

Date & Time: 12/03/2019 - 4:00 AM PST
Frequency: Always
World name: N/A
Character name: N/A
Retainer name: N/A
NPC name: N/A
Monster name: N/A
Class/Level: N/A
Party or solo: N/A
In-game time: N/A
Area and coordinates: N/A
Housing: N/A
Steps:
1. Open game, wait til title screen shows
2. Move mouse diagonally
3. Witness extreme graphical lag
4. Here is some videos of it happening: https://www.youtube.com/watch?v=xqdOxwgSI4A & https://www.youtube.com/watch?v=Fk2Kj6dwCHg

Connection Specs
- Type of internet connection/provider: Xfinity Gigabit
- Modem maker/model number: Xfinity

■ PC Specs

To obtain the system information, open the FFXIV launcher and select Config → System Information → Display.

-=-=-=-=- System Information -=-=-=-=-

Note: The System Information button does not exist in the Mac Launcher (https://imgur.com/Q127Nf6)

Mac mini 2018
Proccesor: 3.2 GHz 6-Core Intel Core i7
Memory: 32 GB 2667 MHz DDR4
Graphics: Radeon RX 590 8 GB (via Razer Core X eGPU)

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-