Output filenames with start with .xdp and end with hash?

[antrys]

I just downloaded using the link at https://flacon.github.io/ (launches mint software manager to install Flathub version)
My system is Linux Mint 20.3
Flacon reports version 9.0
Output Directory: Same directory as cue file
Output Pattern: %n - %t - %a
Codepage UTF-8

I'm trying to convert a single FLAC/cue into individual flacs, but all my output files are named like this:
".xdp-02 - Peg O' My Heart - The Harmonicats.flac-82bRys"

I've tried with/without replay gain, same result every time.
If I manually rename the files they play fine.

[antrys]

Just a followup in-case someone else is a thick as me.
Use "Open Folder" instead of "Open Disc" for files on the harddisk.

[SokoloffA]

Looks like a bug. Both buttons should give the same result.