Lagging when editing any kind of text
Taking too long time responding and sometimes freezing when trying to edit any kind of texts, including system txt, staff txt, lyrics, tempo, etc. Sometimes causes crash when RAM has low free space.
This problem takes place in every single 3.x.x versions. This happens in 3.0.0 (first 3.x build), 188.8.131.5287.06a66a2 (current 3.x release), and 3.0.1.a504e39 (current 3.x DEV release).