This might be settings related. Could you please DM me with your app settings? You can generate a dump of your settings by: Tap the three dots button (bottom right) on the home screen. Tap Settings. Tap Import & export settings. Tap Export settings.Tap Copy to clipboard.
Update
I did some basic profiling of the app and didnt see anything that stood out to me. Resource usage by the app seems to be within what you'd expect.