There could be several reasons for this.
Check what Firmware your headset is on. V27 is plagued with issues.
If it's just happening in the last few weeks it might be a problem with a Windows Update, these two updates are causing problems at the moment. KB5001330 and KB5001337.
Nvidia drivers. There is an ongoing issue with Nvidia drivers and Steam VR, causing stutters and lag in games if you are using any kind hardware monitoring software. The solution is to turn off all hardware monitoring before playing VR.
Can I ask you what's the exact make and model of your Router and is it dedicated for the Quest 2?
The router I can’t remember the brand but it’s a 5ghz EE router and I dedicate the 5Ghz to the Q2 only. It’s bit rate can consistently go to 150Mbs but I run at 100 to save 10ms of lag. In VD it always reports running at 866Mb all the time.
I am aware of the nvidia issue and have been for some time- I follow the huge thread on Nvidia by a chap called Funtastic. I’ve tried every driver like I said but all yield similar performance issues.
I didn’t realise about the windows issue so thank you for that.
As for Oculus, I’m on v27 so should I somehow force that through?
Your help and feedback is greatly appreciated