Incomplete package dependencies

[Dima]

The addition package which is needed to start timidity in GUI mode:

freepats

The package is in recommended list, but it is needed to start the GUI.

1,2) See the apport attachment
3) An appearing of timidity GUI.
4) It did not appear until freepats installation.
The console output:

user@user:~$ /usr/bin/timidity -ia
/etc/timidity/freepats.cfg: No such file or directory
timidity: Error reading configuration file.
Please check /etc/timidity/timidity.cfg
user@user:~$

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: timidity 2.13.2-41
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: LXDE
Date: Sun Jun 17 19:47:30 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2018-06-11 (6 days ago)
InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: timidity
UpgradeStatus: No upgrade log present (probably fresh install)