Error from dsolve in sympy 1.13.3

[nma%12...@gtempaccount.com]

Python version: 3.13.1 (main, Dec 4 2024, 18:05:56) [GCC 14.2.1 20240910] 

Sympy version 1.13.3

This ode gives error 

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from sympy import *
x = symbols("x")
A,B,G = symbols("A B G")
y = Function("y")
ode = Eq(-A*B*y(x) + x*(1 - x)*Derivative(y(x), (x, 2)) + (G - x*(A + B + 1))*Derivative(y(x), x),0)
dsolve(ode,func=y(x))

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ValueError: Expected Expr or iterable but got None

But if I replace G above with 1, it works

ode = Eq(-A*B*y(x) + x*(1 - x)*Derivative(y(x), (x, 2)) + (1 - x*(A + B + 1))*Derivative(y(x), x),0)  
dsolve(ode,func=y(x))

No error.  This looks like a bug?

--Nasser