There seems to be a bug when viewing the players inventory through something other than the vanilla interface, not showing the purse at all (im finding this error specifically with Inventorio)
It would be great if it was able to be shown on more interfaces, especially on ones that replace or augment the users inventory

The purse also seems to be letting the user click through an open view of it and click on any slots behind it

I am unsure of how to interpret this issue, but I assume you mean that the purse is missing from specific screens.
This isn't something that is easily solveable, as any mod could add any screen, which might or might not want the purse. As of now we have to manually add the purse to specific screens, so supporting this out of the box isn't feasible at the minute.

Ah, yeah didn't think of that. I was primarily referring to the Inventorio extended inventory screen if that helps
But otherwise yeah, minor thing