Which HMD are you using? Ive tested 4.26 on multiple machines with a Rift S, Quest 2 and Reverb G2 and in each case I noticed these things (among others):
- Translucent materials only appearing in one eye
- Normal maps displaying incorrectly
- Controller inputs not working or working incorrectly
- General instability/low frame rate
This was shortly after 4.26 was released and I just went back to 4.25, which is stable and works excellently. Im not the only one, by the way; these issues and others were experienced fairly broadly and on a wide variety of configurations. If youre not seeing the same kind of issues, then that’s great! Maybe Epic went the extra mile and hotfixed 4.26 for VR 
My advice is the same: Try in a version thats more stable for VR and see if the problem goes away. Another cause may be collision issues between your camera and whatever capsule or other collision method you’re using in your player pawn. I wasn’t being sarcastic, apologies for the flippant response