Generating component does not add declaration to module

This will successfully create a module
> ionic generate module tstmdule

When creating a component inside a module,
> ionic generate component tstmdule/tstcmpnt

it does create the component files but it does not update the tstmdule (app/tstmdule/tstmdule.module.ts) module to have the TstcmpntComponent declaration

When I commented out this part in `angular.json` file and generate a component it updates the module successfully
> "cli": {
> "defaultCollection":"@ionic/angular-toolkit"
> }