Newly bought peat--vinegar smell

[Green]

I have never had a batch of peat moss smell like vinegar until last week. I opened a newly-purchased bale--which was vacuum sealed (!)--and immediately smelled a vinegar smell. I decided to use it see if my grass comes up ok...I am starting to reseed a few Triv spots already.

But before I use this on a bigger project, like a renovation, is there anything we need to discuss about this smell?

When I say vacuum sealed, I mean it. The plastic wrapper was shrunken/puckered in at the end. I was like, wow, nice touch...must be really fresh. Then opened it, heard the hiss of air, sniffed it...and vinegar smell.

[Green]

The grass has started to germinate in the seeded areas where I used this peat moss. So it's apparently not an issue in that respect.