The game for the most part, works fine. But the navigation and actual gameplay is really laggy, worse when you set it to x2, even worse in x3. The program just can't manage it. My phone is a Huawei Mate 20 Pro and running latest android 10. So it's not my phone is low spec since it's not, the game isn't optimised well, that's what I see.
Thoughts?
Sounds like your apps might need updating or maybe the software in your phone isn't meant for gaming. My old Samsung Note 5 wouldn't run most games I like because it wasn't meant for gaming.
There are some places we all get lag, like big 2 level rooms, Mask of the Ibis, and Torquemada's room in Mission 28.
My phone is prepaid LG Stylo 4 from Straight Talk (Wal-Mart) and the only real meltdown it causes me is sometimes lagging in HQ. My tablet has no issues other than the rooms I've mentioned.
Try switching to "auto" then turn it off when you have mission lag. Alot of time this helps.