Show another sheet column in Form

It´s what I call a ping pong effect. I have seen this before when an APP has multiple choices and relations

Here you can see this annoying effect

If you select an option, the relation works but there is a delay to read/write the final value and meanwhile, the old value comes back and changes the screen. I have thought it could be a failure caused by internet speed (sometines the ping pong effect appears at beggining and later, everything works fine).

@ThinhDinh (or anyone else) could you check it out this behavior using my demo APP indicated above? Just to discard an internet issue.

The plan B would be to call @Mark to understand this effect and find out a workaround.

Thanks y saludos para todos!