WHM: Healing the target doesnt work

Time: Every dungeon
Frequency: in Every dungeon 2-3 times
World: Omega
Character name: Ela Pidae
Class: WHM (maybe other healing classes are involved...)
Area and coordinates: Several different dungeons

Description: Since the update to SB, i have issues to heal the target. It always accurs whenever I switch from one target to another (e.g. Tanker to DD), the focus is on the target but it continues to heal the Tanker (several times even after changing the target). It seems a generall problem because I know 3 other WHMs who have exactly same issues since the update to SB.
Please consider this issue and check upon it.


Steps:
1. Healing Tanker
2. Switching to DD
3. Continues to heal tanker several times
4. Switch the target back and forward, works fine then

Connection Specs
- Type of internet connection/provider: Unity Media
- Modem maker/model number: Connectorsbox from Unity Media

■ PC Specs

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

SYSTEM_OS Windows 10 Home 64-Bit-Version (6.2, Build 9200) (14393.rs1_release.170602-2252)
SYSTEM_CPU Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz (8 CPUs), ~2.6GHz
SYSTEM_CORE_NUM SYSTEM_CORE_LOGIC 8 SYSTEM_CORE_PHYSICS 4
SYSTEM_BIOS E179BIMS.104
SYSTEM_LANGUAGE Deutsch (Gebietsschema: Deutsch)
SYSTEM_MEMORY 16259.883MB
SYSTEM_VIRTUAL_MEMORY 134217727.875MB
SYSTEM_PAGE_FILE 18691.883MB
SYSTEM_STORAGE C:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 237.177GB SYSTEM_FREEDISC_SPACE 117.015GB
SYSTEM_STORAGE D:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 914.397GB SYSTEM_FREEDISC_SPACE 914.146GB
SYSTEM_DIRECTX_VERSION DirectX 12
SYSTEM_GRAPHICS Intel(R) HD Graphics 530
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY1
SYSTEM_GRAPHICS_CHIP Intel(R) HD Graphics Family
SYSTEM_GRAPHICS_MAKER Intel Corporation
SYSTEM_GRAPHICS_VRAM 128.000 MB
SYSTEM_GRAPHICS_SHARED_VRAM 8129.941 MB
SYSTEM_GRAPHICS_DAC Internal
SYSTEM_GRAPHICS_DISPLAY_MODE 1920 x 1080 (32 bit) (120Hz)
SYSTEM_GRAPHICS_DRIVER C:\WINDOWS\System32\DriverStore\FileRepository\igdlh64.inf_amd64_0745f11ce6fc197c\igdumdim64.dll,C:\WINDOWS\System32\DriverStore\FileRepository\igdlh64.inf_amd64_0745f11ce6fc197c\igd10iumd64.dll,C:\WINDOWS\System32\DriverStore\FileRepository\igdlh64.inf_amd64_0745f11ce6fc197c\igd10iumd64.dll,C:\WINDOWS\System32\DriverStore\FileRepository\igdlh64.inf_amd64_0745f11ce6fc197c\igd12umd64.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 21.20.0016.4534
SYSTEM_GRAPHICS_DRIVER_DATE 10/7/2016 02:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE Englisch
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_GRAPHICS NVIDIA GeForce GTX 1060
SYSTEM_GRAPHICS_DEVICE Unknown
SYSTEM_GRAPHICS_CHIP GeForce GTX 1060
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 14214 MB
SYSTEM_GRAPHICS_SHARED_VRAM SYSTEM_UNKNOWN
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE Unknown
SYSTEM_GRAPHICS_DRIVER C:\WINDOWS\System32\DriverStore\FileRepository\nvmii.inf_amd64_0f0e1a8d1e6d3596\nvd3dumx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmii.inf_amd64_0f0e1a8d1e6d3596\nvwgf2umx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmii.inf_amd64_0f0e1a8d1e6d3596\nvwgf2umx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmii.inf_amd64_0f0e1a8d1e6d3596\nvwgf2umx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 21.21.0013.7866
SYSTEM_GRAPHICS_DRIVER_DATE 2/9/2017 02:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE Englisch

SYSTEM_GRAPHICS_PIXEL_SHADER
SYSTEM_GRAPHICS_VERTEX_TEXTURE
SYSTEM_SOUND Lautsprecher (Realtek High Definition Audio)
SYSTEM_SOUND_DEVICE_ID {F278EE75-6A06-4732-A7B6-5AF5CD23FD7F}
SYSTEM_SOUND_DEVICE_NAME RTKVHD64.sys
SYSTEM_SOUND_DRIVER_VERSION 6.00.0001.8010
SYSTEM_SOUND_DRIVER_LANGUAGE Englisch
SYSTEM_SOUND_DRIVER_DATE 12/6/2016 00:00:00
SYSTEM_INPUT {6F1D2B60-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Maus
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 3 SYSTEM_GAMEPAD_BUTTON 5 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {6F1D2B61-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Tastatur
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 128 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFEF2C10-CE35-11E6-8001444553540000}
SYSTEM_INPUT_NAME SteelSeries Gaming Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 265 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFF17600-CE35-11E6-8002444553540000}
SYSTEM_INPUT_NAME MSI EPF USB
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {2669E400-CE9D-11E6-8001444553540000}
SYSTEM_INPUT_NAME RAPOO 5G Wireless Device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {266A3220-CE9D-11E6-8002444553540000}
SYSTEM_INPUT_NAME RAPOO 5G Wireless Device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 897 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {266A5930-CE9D-11E6-8003444553540000}
SYSTEM_INPUT_NAME RAPOO 5G Wireless Device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFF1C420-CE35-11E6-8003444553540000}
SYSTEM_INPUT_NAME Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {266A8040-CE9D-11E6-8004444553540000}
SYSTEM_INPUT_NAME RAPOO 5G Wireless Device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFF21240-CE35-11E6-8005444553540000}
SYSTEM_INPUT_NAME Radio Switch Device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 1 SYSTEM_GAMEPAD_FOV 0