2.5.1, 2.4.3 are missing solutions in conditional thue

2.5.1 and 2.4.3 on ubuntu x86_64.

? p=x^3 - 18*x^2 + 81*x + 1;a=3^3
%1 = 27
? t=thue(thueinit(p,0),a);[#t,t]
%2 = [3, [[0, 3], [3, 0], [19, 2]]]
? t=thue(thueinit(p,1),a);[#t,t]
%3 = [4, [[0, 3], [3, 0], [27, 3], [19, 2]]]

2.5.1 doesn't give warning, 2.4.3 mentions GRH (surely incorrect).