Cuspidal divisor group conjecture for Drinfeld modular Jacobians

Let $A$ be the ring of functions regular away from a fixed place at infinity, and let $\mathfrak n\lhd A$ be a non-zero square-free ideal. Let $X_0(\mathfrak n)$ be the smooth projective Drinfeld modular curve, let $J_0(\mathfrak n)$ be its Jacobian, let $\mathcal{C}(\mathfrak n)$ be the subgroup generated by classes of divisors $c-c'$ for cusps $c,c'$ of $X_0(\mathfrak n)$, and let $\mathcal{T}(\mathfrak n):=J_0(\mathfrak n)(F)_\mathrm{tor}$, where $F$ is the function field of $A$. For square-free $\mathfrak n$, the cusps are $F$-rational, so $\mathcal{C}(\mathfrak n)\subseteq\mathcal{T}(\mathfrak n)$. Drinfeld modular cuspidal torsion conjecture. For every square-free ideal $\mathfrak n\lhd A$, the two groups are equal:

$$\mathcal{C}(\mathfrak n)=\mathcal{T}(\mathfrak n).$$

This is proposed as the Drinfeld-modular analogue of the generalized Ogg conjecture. The source gives no resolution status for the assertion.