Cool they spawned! It is a bintan-variant, impossible to tell which one exactly. It seems very similar to one of mine.
Parosphromenus‘s sister group, Betta, contains a lot of mouthbrooders. Some bubblenesting species are know to sometimes carry their eggs ot fry, and in B. brownorum some strains even really mouthbrood at certain conditions.
Since Parosphromenus and Betta are closely related it won’t surprise me if similar behaviour would also occur with paros.
About the eggs being on the ground:
Perhaps the male isn’t experienced enough to correctly stick the eggs to the top of the canister.