Workflow agent with Email as trigger - .xlsx attachment reading

Summary:

We are developing a Workflow agent with Email as trigger.
We read the email attachment using : {{$context.$triggers.EMAIL.$input.attachments[0].context}}

Before 26C upgrade, we were able to read excel attachment (.xlsx) using the above approach and pass the fields for downstream processing in workflow

After 26C upgrade, {{$context.$triggers.EMAIL.$input.attachments[0].context}} returns unreadable (binary output) . Looks it is considered as zip file and returns unreadable output like "PK!��{�l[Content_Types].xml �(��U�n�0�W�?D�V����*��[$��x �my���;1���EH�$J�y�L��l�2YA@�l&:i[$`s���g�{��z ��Z��B&��b�|�M�0�j��(�����P)L��+3*E��ҫ|�� ����̝%�ԢC�{C��eI���_�L���n_M� �}irE,T���C�r���A�|Y1t�>��XPU�>f c"