Problems properly decoding a base64 encoded string

It’s correct

the decoded string contains those characters

echo "ZG2p8/z2ATu8NVLBXmeFtkX9chpkbk2EK9fH4qVKxvC//mSlIdsqzvZpNa4k7tPPR86RmiGkdi0BLwAEtPbkXA==" | base64 -D -i - | hexdump -c
0000000   d   m   �   �   �   � 001   ;   �   5   R   �   ^   g 205   �
0000010   E   �   r 032   d   n   M 204   +   �   �   �   �   J   �   �
0000020   �   �   d   �   !   �   *   �   �   i   5   �   $   �   �   �
0000030   G   � 221 232   !   �   v   - 001   /  \0 004   �   �   �   \
0000040