Hi!
Latest REAPER version have strange bug related to Waves LinMB *range* display - after start Playing that *range* magically gone and backs only after preset reload. In other DAWs and older REAPER versions problem doesn't exist and all works normally.
Software versions:
REAPER - 5.32
Waves Central - 2016/12/26
Presentation here (too big to attach):
https://i.imgur.com/9yTcxTx.gifv