After paying invoice, there wasn't any feedback about successfull payment

[madvas]

After paying invoice, transaction was processed, but there were no changes in UI, pay invoice button still enabled. After refreshing page it loaded as paid invoice.

[madis]

This was probably due to the server not havin gprocessed the smart-contract event when the UI got notification and queried updated invoice data from GraphQL.

I'll improve it (probably going with polling the graphql couple of times)