I have the following parser mapping for Unreal log files:

[%d{yyyy.MM.dd-HH.mm.ss:fff}][%3t]%c: %p: %m%n
[%d{yyyy.MM.dd-HH.mm.ss:fff}][%3t]%c: %m%n
%c: %m%n
%m%n

It used to work very well, until recently where (one of) the update broke the Level such that some logs without a Level are parsed as having a Level. If I were to guess, it looks like LogViewPlus is searching for the Level with wildcards in between each character e.g., "e*r*r*o*r". Just a guess.

In the following screenshot, you can see that the log is clearly not 'Severe'. All the letters (underlined red by me) are present though (and I found that to be the case with all the logs that have incorrect Level.