I’ll try my best - even though there isn’t much to add, really.
- Install the Link2SD app at https://play.google.com/store/apps/details?id=com.buak.Link2SD.
- Run Link2SD, allowing the ‘Superuser Request’ (just once, or for 10 minutes).
- Go to settings (the three little dots in the upper right corner) and choose ‘settings’.
- Under section ‘Native App2SD Settings’, choose ‘install location’ > ‘Internal’. I haven’t tried ‘External’, but if this setting means apps will be moved/stored to your external SD card, it could be worth a try…
And that’s all there is to it. Now, it is even safe to uninstall the app - otherwise you might be faced with the occasional ‘Superuser Request’ by Link2SD out of the blue. Even after uninstall, the memory bug will be gone for good.