I'm having this same issue. Even after resetting the phone and clearing the cache the typing is still lagging and not as fluid as before I joined the beta program.
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Anyone else with a N20U feel like the phone isn't operating at 120hz on the ONEUi 4 beta ? Typing response is slow; scrolling looks laggy and not smooth as before. I checked my settings and it's on adaptive as well as having developer options on and AL animations set to .5x. Still doesn't feel as smooth as before I joined the Beta.
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