FPS limited to 60fps while Passive Skill Tree open in Chrome on 2nd Monitor

So this bug may sound kind of crazy, but here's my current situation:

When I open the passive skill tree in Chrome on a secondary monitor, my FPS drops to 60fps. As soon as I change the tab to something else, it goes back to 144fps.

Repro steps:
1. Open PoE on primary monitor, sign in, enter any area (i.e. I'm currently in A4 Town)
2. Open Chrome on secondary monitor, to almost any site.
3. Experience PoE at 144fps on the 144Hz primary monitor without difficulty.
4. Open a new tab in Chrome, go to the PoE.com Passive Skill Tree, i.e. https://www.pathofexile.com/passive-skill-tree/AAAABAQAANlhhVIV7BiR9zLiYWRSBS2XeWNwQzE6UhpV6Ua9NotPivBfP1n-vJ826HTtuR12rA48FHG-p9rBR37qGM9-m2p7dBHVMHfBo2EhrlDKkGBBfNmGYGVNKCplp-RR-OtQR1eXFCDvDq2NhNmE7w==
5. PoE immediately drops to 59-60fps (both as non-active or active window)
6. Change Chrome back to other tab, PoE jumps back to ~144fps


So technically this might be a weird website error, but it's the PoE site (and only the passive skill tree, i.e. forums are fine), so hopefully I'm still good filing a bug report here.

Album showing framerates here:
http://imgur.com/a/zghdi


PoE version: 3.0.0b (also affecting 3.0.0a)
Chrome version: 59.0.3071.115 (official 64-bit)

DXDiag report:
Operating System: Windows 10 Pro 64-bit (10.0, Build 14393) (14393.rs1_release.170706-2004)
Language: English (Regional Setting: English)
System Manufacturer: ASUS
System Model: All Series
BIOS: BIOS Date: 10/16/14 18:06:47 Ver: 21.02
Processor: Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz (8 CPUs), ~4.0GHz
Memory: 16384MB RAM
Available OS Memory: 16326MB RAM
Page File: 9710MB used, 9048MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 12
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 10.00.14393.0000 64bit Unicode


Video card:
Card name: NVIDIA GeForce GTX 1080 Ti
Manufacturer: NVIDIA
Chip type: GeForce GTX 1080 Ti
DAC type: Integrated RAMDAC
Device Type: Full Device
Device Key: Enum\PCI\VEN_10DE&DEV_1B06&SUBSYS_63903842&REV_A1
Device Status: 0180200A [DN_DRIVER_LOADED|DN_STARTED|DN_DISABLEABLE|DN_NT_ENUMERATOR|DN_NT_DRIVER]
Device Problem Code: No Problem
Driver Problem Code: Unknown
Display Memory: 19287 MB
Dedicated Memory: 11123 MB
Shared Memory: 8163 MB

Not stated: eVGA Reference 1080 Ti, if that matters.


Monitor 1:
Current Mode: 2560 x 1440 (32 bit) (144Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: XB271HU
Monitor Id: ACR0490

Monitor 2 (portrait, left of monitor 1):
Current Mode: 1200 x 1920 (32 bit) (59Hz)
Monitor Name: Dell U2412M(DisplayPort)
Monitor Model: DELL U2412M
Monitor Id: DELA07B

Monitor 3 (portrait, right of monitor 1):
Current Mode: 1200 x 1920 (32 bit) (59Hz)
Monitor Name: Dell U2412M(DisplayPort)
Monitor Model: DELL U2412M
Monitor Id: DELA07B