The Aura SE is in a similar boat as the H2OČ in that it has two hardware revisions.
I'm assuming 4.35 broke that distinction like it did on the H2OČ (and apparently on the Touch B/C, too).
The quoted snippet doesn't work because it's tailored for the H2OČr1 (378 -> 374).
So you're effectively making KOReader think you have an H2OČr1, which fixes the refresh issue, but introduces input & rotation ones, as you noticed

.
For an Aura SE r1, you'll want to switch from 379 to 375 instead.
TL;DR: Replace the 4 by a 5 in that sed command.