With a small modifier-sweepable trim range defined, the source changing too rapidly causes the loop to get stuck playing back a certain portion outside of the current trim range. For example, record a loop of 10 seconds or so and assign LFO1 to start trim 0-95%, end trim 5-100%. If the LFO rate is slow enough the playback follows the LFO position, but above a certain rate the issue occurs. Lowering the rate again will allow the loop to follow the trim range correctly. This can be seen on the screen as well, with the playback line in a part of the loop outside the trim range. (FW 14.00)