Ocelot is very slow when dealing with bidirectional text

A reviewer is experiencing the following issues with some projects containing bidirectional text. Attached some example files.

1. When I try to expand Ocelot to a full screen mode, I just see black background around.
2. When I try to start editing a string, it takes a long time before I can start typing in.
3. When I try to exit an edited string, it takes a long time before I can move to the next string, and then I sometimes find out that the string doesn't look the same as I tried to close it.

Additional info: it refers to the version v3.0-rc12 and the OS is Windows 10 Enterprise 64 bits