First person shadow is not affected by the shadow quality setting

Steps to Reproduce:

1. Import any resource pack with PBR capabilities;
2. Enable the experimental toggle for Render Dragon features;
3. Switch rendering mode to "Deferred Technical Preview";
4. Set Shadow Quality to Medium, High or Ultra;
5. Observe your shadow, switch perspectives and compare.

Observed Results:
The first person shadow always has jagged edges regardless of the setting.

Expected Results:
The first person shadow quality scales with the setting and matches the environment.

Screenshots/Videos attached: Yes

Notes: