It seems like it could be it but I do have a few more questions if that's ok:
- is this a new thing or has it been enabled automatically recently?
- what would be the consequences if I disabled that (I understand it would be at the schema a minima) for other tables, considering this is a production environment?
- if I do disable it for this schema, will it fix the sync pipeline or is that data lost forever now (meaning I still have to recreate the index)
- and last, this is quite a big caveat for index source tables, should it be reported and to whom?

Thanks a million for your kind and very fast answer!