[Maxima] Version konflict

[Hans W. Hofmann]

Maxima 18.1 wxmaxima 0.8.2
EV:eigenvectors(A);
[[[-(sqrt(481)-25)/2,(sqrt(481)+25)/2],[1,1]],
[1,-(sqrt(481)-9)/20],[1,(sqrt(481)+9)/20]]

Maxima 19.2 wxmaxima 0.8.3
EV:eigenvectors(A);
[[[-(sqrt(481)-25)/2,(sqrt(481)+25)/2],[1,1]],
[[[1,-(sqrt(481)-9)/20]],[[1,(sqrt(481)+9)/20]]]]

get different lists of eigenvectors
all handling of eigenvektors fails in my Workbooks
T:transpose(matrix(EV[2]/betragLaenge(EV[2]),EV[3]/betragLaenge(EV[3])));

any suggestions