Plugging headphones into PC doesn't change 5.1 to 2.0, so I lose some audio

[King Mustard]

• PotPlayer v1.7.21525 (July 2021)
• ASRock B550M Pro4 motherboard (manual) with on-board Realtek ALC1200 audio
• Realtek Audio Driver v6.0.9147.1 (April 2021)
• Logitech Z906 5.1 speaker system (user guide)
• Corsair HS60 Pro Surround Gaming Headset (manual)
• Cooler Master MasterBox NR400 case

Within PotPlayer > Preferences > Audio, I have Speakers set to 3/0/2+LFE (5.1 Channels), which works fine through my speakers.

However, if I connect my headphones to my case's front-panel audio jack, PotPlayer remains in 5.1, so if I watch 5.1-channel content, I simply miss audio channels when listening.

Is there a solution to this, apart from keep changing PotPlayer's Audio preferences?