Still having the issue and PiP & BOOBS isn't working so here's my ini to see if anything is incorrect in it. I've checked WoW clients and they are all set to be windowed and maximized so I can't see what the issue could be.

[general]
version=1806
port=1320
name=dante
boost_performance=0
auto_add=1,1,'World of Warcraft'
auto_add_keymap=0,''
auto_connect=0,''
pass_mouse_clicks=0
send_only=0
distinguish_lr=0
maximizer_enabled=1
always_on_top=0
proxy_enabled=0
proxy=
proxy_uname=
has_startup_cmd=0
startup_cmd=
startup_cmd_delay=5
hotkey_bringtofront=0.0
mousefocus=1

[donotpass]
whitelist=0
count=10
key_00=13.0
key_01=65.0
key_02=66.0
key_03=68.0
key_04=76.0
key_05=78.0
key_06=82.0
key_07=83.0
key_08=87.0
key_09=191.0

[roundrobin]
count=0

[commands]
count=5
command_00=account
action_00=D:\Games\WoWIva\Wow.exe
keymap_00=
region_00=region1
uname_00=1.'account'
cpu_00=00000001
maxfps_00=45.15
excludeRR_00=0
alwaysOnTop_00=0
lockInForeground_00=0
command_01=account2
action_01=D:\Games\WoWBaan\Wow.exe
keymap_01=
region_01=region3
uname_01=1.'account2'
cpu_01=00000002
maxfps_01=45.15
excludeRR_01=0
alwaysOnTop_01=0
lockInForeground_01=0
command_02=account3
action_02=D:\Games\WoWSmar\Wow.exe
keymap_02=
region_02=region0
uname_02=1.'account3'
cpu_02=10000000
maxfps_02=60.15
excludeRR_02=0
alwaysOnTop_02=0
lockInForeground_02=0
command_03=account4
action_03=D:\Games\WoWNuaa\Wow.exe
keymap_03=
region_03=region2
uname_03=1.'account4'
cpu_03=00000004
maxfps_03=45.15
excludeRR_03=0
alwaysOnTop_03=0
lockInForeground_03=0
command_04=account5
action_04=D:\Games\WoWCall\Wow.exe
keymap_04=
region_04=region4
uname_04=1.'account5'
cpu_04=00000008
maxfps_04=45.15
excludeRR_04=0
alwaysOnTop_04=0
lockInForeground_04=0

[mousemap]
count=0

[regions]
count=5
region_name_00='region0'
region_00=1,0,0,1679,1048,0,0
region_pip_00=0,(117.0.0)
region_name_01='region4'
region_01=1,840,524,1679,1048,1,0
region_pip_01=0,(121.0.0)
region_name_02='region2'
region_02=1,840,0,1679,524,1,0
region_pip_02=0,(119.0.0)
region_name_03='region3'
region_03=1,0,524,840,1048,1,0
region_pip_03=0,(120.0.0)
region_name_04='region1'
region_04=1,0,0,840,524,1,0
region_pip_04=0,(118.0.0)

[cmd_history]
count=5
cmd_00=account
cmd_01=account2
cmd_02=account3
cmd_03=account4
cmd_04=account5
last=account3

[override]
hotkey=19.0
hotkey2=0.0
suspend_hotkey=0.0
dnp_hotkey=33.0
rr_hotkey=0.0
enable_overlays=1
enable_audio_reminder=0
reminder_delay=20
message=mute
font_name=tahoma
font_sz=30
font_color=20.200.0

[sounds]
count=6
sound_00=1001,1,'D:\Games\keyclone\sounds\open.wav '
sound_01=1002,1,'D:\Games\keyclone\sounds\close.wa v'
sound_02=1003,1,'D:\Games\keyclone\sounds\override _on.wav'
sound_03=1004,1,'D:\Games\keyclone\sounds\override _off.wav'
sound_04=1005,1,'D:\Games\keyclone\sounds\override _reminder.wav'
sound_05=1006,1,'D:\Games\keyclone\sounds\roundrob in.wav'