Contribution receipt no longer sends groupName to alterMailParams hook
Looks like it's these changes: https://github.com/civicrm/civicrm-core/pull/22615/files#diff-9a5050a22004395ee29b440cd543c11c4283cdb72563f28eae30806e5eba8cd3L418
I know there is some ongoing work to deprecate groupName etc but I thought current hooks would still work for now, unless I missed it somewhere in a dev-digest.
Putting regression (in master) for the moment.