XFCE panel window buttons freezes sometimes

Sometimes if there are few windows open (eg. terminal, video player, file manager etc), closing a window which is closer to whisker menu freezes the panel for few seconds before stacking remaining buttons to the left. This happens like once or twice a day. Although this problem is not new to me as i had xfce manjaro 4 months ago and switched to kde due to this. I have uploaded screenshot for better understanding. Also i am using Matcha-dark-sea theme, Papirus-Dark-Maia icon, 144 custom DPI font with 'Full' Hinting and 'None' Sub-pixel order. Fonts settings are default and i only changed the custom DPI.imageedit_1_4522679902

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My specs
System:
Host: manx Kernel: 5.7.9-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.1.0
Desktop: Xfce 4.14.2 tk: Gtk 3.24.20 info: xfce4-panel wm: xfwm4
dm: LightDM 1.30.0 Distro: Manjaro Linux
Machine:
Type: Desktop System: Gigabyte product: H110M-S2 v: N/A serial:
Mobo: Gigabyte model: H110M-S2-CF v: x.x serial:
UEFI: American Megatrends v: F24a date: 01/10/2018
CPU:
Topology: Dual Core model: Intel Core i3-6100 bits: 64 type: MT MCP
arch: Skylake-S rev: 3 L2 cache: 3072 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
bogomips: 29608
Speed: 3593 MHz min/max: 800/3700 MHz Core speeds (MHz): 1: 3602 2: 2433
3: 3700 4: 2325
Graphics:
Device-1: NVIDIA GM107 [GeForce GTX 750 Ti] vendor: ZOTAC driver: nvidia
v: 440.100 bus ID: 01:00.0 chip ID: 10de:1380
Display: x11 server: X.Org 1.20.8 driver: nvidia tty: N/A
OpenGL: renderer: GeForce GTX 750 Ti/PCIe/SSE2 v: 4.6.0 NVIDIA 440.100
direct render: Yes
Audio:
Device-1: Intel 100 Series/C230 Series Family HD Audio vendor: Gigabyte
driver: snd_hda_intel v: kernel bus ID: 00:1f.3 chip ID: 8086:a170
Device-2: NVIDIA GM107 High Definition Audio [GeForce 940MX] vendor: ZOTAC
driver: snd_hda_intel v: kernel bus ID: 01:00.1 chip ID: 10de:0fbc
Sound Server: ALSA v: k5.7.9-1-MANJARO
Network:
Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
vendor: Gigabyte driver: r8169 v: kernel port: d000 bus ID: 02:00.0
chip ID: 10ec:8168
IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac:
Drives:
Local Storage: total: 1.02 TiB used: 704.89 GiB (67.6%)
ID-1: /dev/sda vendor: Western Digital model: WD10EZEX-00WN4A0
size: 931.51 GiB speed: 6.0 Gb/s rotation: 7200 rpm serial:
rev: 1A01 scheme: GPT
ID-2: /dev/sdb vendor: Kingston model: SA400S37120G size: 111.79 GiB
speed: 6.0 Gb/s serial: rev: J1A3 scheme: GPT
Partition:
ID-1: / size: 30.04 GiB used: 8.24 GiB (27.4%) fs: ext4 dev: /dev/sdb6
ID-2: swap-1 size: 3.91 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sdb5
Sensors:
System Temperatures: cpu: 37.0 C mobo: N/A gpu: nvidia temp: 35 C
Fan Speeds (RPM): N/A gpu: nvidia fan: 33%
Info:
Processes: 211 Uptime: 3m Memory: 7.74 GiB used: 1.10 GiB (14.2%)
Init: systemd v: 245 Compilers: gcc: 10.1.0 Shell: bash v: 5.0.18
running in: xfce4-terminal inxi: 3.0.37

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