What app version?
(copy the Settings > version > Info)
What Android version?
What device model?
From where and when did you install the app?
Do you use offline maps (what maps)?
You can turn off vegetation in map layers.
Are the offline maps in a bad SD card?
You can uninstall + reinstall the app or clear app data in Android settings.
App should work fine on all devices.
Are there installed any ad / tracking blocker apps?