Roku Express 3930X – Vizio TV waking from standby after OS 14.6 update

I have suspicion that an firmware update has caused an issue with my TV turning on even after it has been powered down. 

Scenario.....  Turn on the Roku Express using Roku remote with the home button. Watch Netflix for a bit. Click the Roku back to the home screen. Physically turn off the TV and leave the Roku powered on. Randomly, the TV will turn itself back on with the Roku home screen. The only way the TV will stay turned off is if the HDMI cable connected to the Roku is unplugged.

I have an older Vizio E55-D0 (2016) tv and the Roku is the only thing connected to it, and it is not a smart tv. It has worked for years without this issue. It all of the sudden started happening in August 2025 ish with no resolution yet. I have disabled the 1-touch setting but there was no change. 

I have not done a factory reset as setting it back up is a pain, but will do it if I absolutely have to.

Have there been any changes to the wake up functionality that would have caused this?

Tv - Vizio E55-D0

Roku - Roku Express 3930X  / OS 14.6