Reload/refresh model relationship

Hi, is it possible to reload/refresh a model relationship? I have this example

const hospital = await Hospital.query()
			.with('physician')
			.where({ id: params.id })
			.first();

hospital.merge(request.post());
await hospital.save();

// hospital.physician is still the same?

When I do that, the physician value is still the same as the old one. I tried

await hospital.save();
const physician = hospital.getRelated('physician');
await physician .reload();

// physician is still the same

but got no luck.

I even tried to load the relationship again

await hospital.merge(request.post());
await hospital.load('physician');

and I got a runtime exception

E_CANNOT_OVERRIDE_RELATION: Trying to eagerload physician relationship twice

Any help would be much appreciated.