Public bug reported:

My network interface is the Qualcomm Atheros QCA9565 / AR9565 Wireless Network 
Adapter and the driver is the ath9k.
I've had this problem years before and I solved it by updating the kernel, but 
this time the problem came with the update.

What happens: when I use my bluetooth headphones, the wifi connection is
extremely slow, unusable. I turn off bluetooth and it works again
quickly.

When it started: Earlier today when I updated the system and the package
was replaced. I send the update history below.

2022-03-08 18:08:32 upgrade linux-generic-hwe-20.04:amd64 5.13.0.30.33~20.04.17 
5.13.0.35.40~20.04.20
2022-03-08 18:08:32 upgrade linux-image-generic-hwe-20.04:amd64 
5.13.0.30.33~20.04.17 5.13.0.35.40~20.04.20
2022-03-08 18:08:36 upgrade linux-headers-generic-hwe-20.04:amd64 
5.13.0.30.33~20.04.17 5.13.0.35.40~20.04.20
2022-03-08 18:08:36 upgrade linux-libc-dev:amd64 5.4.0-100.113 5.4.0-104.118


I didn't want to manually install another kernel version. Is it possible to go 
back to the previous version? It was working really well.

What can I do? Well, thank you very much in advance.

** Affects: ubuntu
     Importance: Undecided
         Status: New

** Attachment added: "anexo.pdf"
   https://bugs.launchpad.net/bugs/1964414/+attachment/5567572/+files/anexo.pdf

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https://bugs.launchpad.net/bugs/1964414

Title:
  wifi disconnecting when i use bluetooth

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