[<com.EuropaParkMackKG.EPGuide>] Does not display integrated maps

[Octo80]

Affected app
Name: Europa-Park & Rulantica
Package id: com.EuropaParkMackKG.EPGuide

Describe the bug
Instead of the integrated map of the fun park, only gray is displayed.

To Reproduce
Steps to reproduce the behavior:

1. Start the app "EP & Rulantica"
2. Switch to the tab "Europa-Park" (at the bottom)
3. If the app hasn't the location permission click on "Weiter" (Next) and allow the permission
4. The map is not displayed

Expected behavior
The App is showing the map as expected.

Screenshots

System
Android Version: 14
Custom ROM: CalyxOS 5.6.3

microG
microG Core version: 0.3.1.240913-23
microG Self-Check results: All ticked

Additional context
I couldn't reproduce the problem on another device with LineageOS 21 with official play services.
I think this problem is related on microG.