Has anyone else come across the issue where OnChange Script does not work on the OpportunityDetailBox in 2019 R1?

I have never had issues with this OnChange Script before.

If I do a Create Script on oppo_holdreason to validate on save, it works. But the OnChange does not do anything. I have tried multiple OnChange scripts in multiple fields but no result.

Here is the script I am using on the OpportunityDetailBox on a field using the Yes/No selection dropdown. Do you see any errors with it?

if (this.value == 'Y')

{

oppo_holdreason.required = true;

oppo_proceed.required = true;

}

Thank you!