There is a minor issue with Logic where Logic sends corrupt midi data
to plugins when recording in loopmode (looptool),
we've released a hotfix for ElectraX 1.2 as well as fixed this in
ElectraX 1.3 (currently in beta).
ElectraX 1.3 is set for release in early July and if I remember
correct the current ElectraX demo also has the fix included,
so redownloading/reinstalling the demo should take care of it.
In the meanwhile another possible workaround is to switch off
loopmode when recording.
from TONE 2