Buying Corps / Army Using Faith Only Produces a Single Unit

Buying a Corps or Army using Faith through Encampments seems to be resulting in an error. It would only produce a single military unit while spending the correct amount of Faith (of what a Corps / Army would cost.) This would happen to all military units.

**Expected behavior**
A Corps or Army should be produced.

**General information**
- OS: Windows 10
- Version: 1.0.0.317
- Expansion: Rise and Fall + Gathering Storm
- Other mods: Environment Skin: Sid Meier's Civilization, Colorized Historic Moments

Reproduce the purchase through an Encampment using Faith with the reported Civilization VI version and expansions. Then trace the Lua handling for Faith purchases of military units, Corps, and Armies. Done means a Faith purchase creates the selected Corps or Army rather than one single unit and charges the corresponding Faith cost.

Written by the indexing model from the issue text.