Sestenes
Sorry, this sample capx is too large. You might provide a segment of text which had bugs.
Sorry about that. Here is a simple capx that illustrates the bug.
Both buttons "Plain" and "Styled" just append a simple string: "More text more text more text more text." The only difference is that the "Styled" button uses a tag text class to make the font color red.
You will notice that after you use the "Styled" button at least once, then when appending additional non-styled text to the tag text object there will occasionally be an odd line break that is clearly not a part of the event sheet logic. Just press "Styled" once, and then "Plain" a few times to see the problem.
Cheers, and thanks for looking into the problem.