I've tried what did raoulmarcelo, without success for me.
The white stripe was there in less than 2 minutes.
Then I reset the default settings in OculusDebugTool, and I could play something like 30 minutes without issue.
This stripe just appears randomly, I played dirt rally 2.0 for about 200 hours with this problem that I had plenty of time to realize.
Sometimes just after starting the PC it appears every 2 minutes, and sometimes the PC is powered on for hours (and hot) it does not appear for 15 to 30 minutes, it's just random.
The only time I was able to play for fifty hours without a problem was with the oculus link V23, since we switched to V24 it's painful.
I had a very similar issue with v28, v29 except my visual artifact had a red tint instead of being white/bleached out. Refer to the attached pic posted earlier (Like this but a red/pink tint): large (749×999) (oculusvr.com)
I was able to fix it by disabling Link settings in OTT, and setting ODT settings to default. For some reason, after the reset I can now change Link values back to custom settings via ODT (OTT Link still disabled) and the visual artifacts haven't returned. I played 90 minutes of Stormland last weekend and all went well.