Roku 75" LED TV keeps switching aspect ratios in the RCA input

Hi all,

I own a good set of old vintage analog players in my entertainment center and have been experiencing problems with several of them. I have a Laserdisc player, Beta, VHS and a PS2. When I play a video in the Laserdisc player the picture seldom ever changes between 4:3 and 16:9 ratios except on a select couple of them. Different story with the Beta and VHS player. during a movie it would contiuously swtch between aspect ratios making the movie less enjoyable. and Finally, I also tried playing my PS2 on the screen, the picture looks good for what it is but for some reason the picture will frequently switch between 16:9 and 4:3 during gameplay which is extremely distracting and takes away from the experience to the point where I didn't want to play it anymore.

In researching this issue I learned that old RCA and some Composite connecitons had WSS (Wide Screen Signal) flags in these analog signals telling the TV set which ratio to try to adjust to, for some reason these TVs don't interpret these signals very well or it confuses them to the point where it switches back and forth. I tried playing with the TV display settings (Direct, Auto, Zoom, Stretch) also didn't fix it since it was still switching between ratios. My ultimate fix was to either use an upscaler from walmart that converts RCA to HDMI at 1080P upscaling and that seemed to work although the picture isn't as good as it was directly connected to the TVs onboard RCA inputs. I want to know if there is a way to get the TV to ignore the WSS flags or if possible if Roku devs can push a software update to ignore these flags as they don't seem particularly useful this day in age if I can manaully select the display preference during play. Thanks in advanced, hope to get a fix so I can enjoy my PS2 again.