Hi,
the following patch to fix a regression in the iwlwifi modul is currently not in the pipeline for the stable kernel 5.3.x?
https://patchwork.kernel.org/patch/11158395/
Checked Kernel: 5.3.1
Card: 03:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a)
Current Firmware: iwlwifi-8000C-36.ucode release/core33::77d01142
Best regards