Try reverting back to version 3.6.2. That should fix the issue which is still under investigation by Tim (see other threads on this problem).
Tony

Hi,

This started one or two releases ago (I am now using 3.6.5) ; but as I knew I was going to upgrade my phone, I decided to wait and see.

I now have an Android 6P and it is so slow I just cannot use it - upgrading to Nougat did not solve anything either

Looking at another thread, I have tried to:
1) delete all but mandatory charts (Just USA basemap + AZ-CA-NV-UT)
2) removed many options of the surface features
3) put the planning offline only to ensure this is not a network issue

Potentially #1 does have an impact but, unfortunately, not enough.

Can you please advise ?

Regards,
Philippe