`ValidateConfig` method does not work when call `terraform validate`

[Rabongg]

• terraform version: 1.11.4

I'm developing a resource provider. According to the docs, the validateConfig method is supposed to be called when running terraform validate, terraform plan, and terraform apply. However, when I run these commands, I find that validateConfig is called when running terraform plan, but not when running terraform validate. Could you please help me determine if I've misconfigured something or if the documentation is incorrect?

result of terraform validate

$>terraform validate 
Success! The configuration is valid.

result of terraform plan

Planning failed. Terraform encountered an error while generating this plan.

-> and following errror was error in validateConfig

[Rabongg]

I'm sorry... It seems that this was caused by my mistake.
Looking at the internal logic of validateConfig, I thought it wouldn't work during terraform validate because the code is validated in this way:

if data.Value == 'value' {
    resp.Diagnostics.AddError("error", "Error Reading data")
}

During terraform validate, we don't know what actual value is coming into validateConfig method data, and we can only check if it's unknown or null. Would it be a good idea to add to the docs that we can only check for these values?