External Monitor Flickering via Thunderbolt.

Hello,

I recently bought a M4 Pro MacBook Pro. When I connect it to an external display (Dell S2721QS) via Type-C to DP, the external monitor is flickering. Someone posted exactly the same issue on YouTube for a MacBook Air 3 years ago, but that solution doesn't help. Is there anyone who knows how to fix it?

Example problem

Some additional info:

• I have work Windows 11 PC as well for work computer and it works fine I can get 4k HDR 60hz without any issue with the same cable.
• I was using the same system with my old MacBook Pro (2016 Touch Bar) and no problem there as well.
• If I use 30hz setting, flickering stops.
• It is not happening always but it mostly happens especially when I watch videos. If I take off and put back the cable or turn on/off the monitor, it may help.
• If I close the MacBook screen and use only external display, Flickering definitely happens with 60hz.
• HDMI looks much more stable but I guess, it doesn't work when I close the MacBook screen. I would prefer to use type-c connection since I can use the same cable with my work PC.
• Some fixes I tried:

1. 1. Change the resolution
   2. Change the refresh rates (The issue happens with 60hz)
   3. Change color profile
   4. HDR on/off
   5. True Tone on/off
   6. MacBook display resolution/color/refresh rate changes.
   7. DDC/CI on/off
   8. Night shift is off