Problem with a certain burn-redeem page


Some collectors have had issues with a certain burn & redeem page;

The token to be redeemed is token #6 from the this manifold erc-1155 contract:

I’ve created another burn & redeem page before that one, which DIDN’T seem to have any issues.
The users having problems tried to redeeem from desktop, so me not having set a fallback provider shouldn’t be the issue, right? (I’d still like to set a fallback, just in case, just not sure what to type there)

If anyone has an idea what could cause the issues here (and how i could fix it), i’d appreciate it!

Thanks for reading and in advance for any help!