That topic ended with a possible provider-dependent solution that I’ve seen before.
Sounded odd, however it’s the wrong option (typo?), and the right one is 4 already.
Some are not fully S3 compatible. I’ve seen a few even documenting their subset.
But there are two intermixed issues here. You linked to a compatibility adjustment,
but you also switched providers, and found a faster one. I’m sure some are faster.
Mixes “working” and “working fast” needs. Yes, some providers can vary with both.
“Working” leads us to an unclear signature version situation that I’m asking about.
“Faster” might have more to do with other provider than with the signature version.
I’m still confused about your first provider. Did you try different signature versions?
Or if you’re happier with your second (which might just be faster), just stay there…