Anybody has the same problem?

On the new version 18.00.0.17 when you try to edit a long string example: 26 lines which have 540 characters per line, see screenshot.

If you scroll to the right, you will see, starting column 300++ will be "empty". 
However, as soon as you click using your mouse on that position 301++, the display screen will be updated and the column 300++ will magically appear.

Reinstalling UltraEdit does not fix the problem.

PS: Work around is to use word wrapper.

I have the same problem.

Additionally when working on big log files the search function does stop to work after a couples of times.

Will have to find another editor for these things. At the moment it's impossible to work with UltraEdit.

The new version 18.00.0.19 fix the problem for the long string.

Well, if there is a problem, we can log a case. They are really good to fix the problem.