Not all LA machines are created equal. It is hard to advise without knowing. I regularly run Invisifil on the top of my LA and that is even finer at 100 wt. I have used decobob in my domestic with no issues but I have not run it in my LA. I use magnaglide prewounds in the bobbin. Also what size needle did you use to run the decobob?
Issues I have had with Invisifil breaking, quilt too tight on the rack, needle too small. If I start breaking thread with Invisifil I loosen the top. Most of the time this solves the issue. I have also gone up from a size 14 to a size 16 needle when I am having a lot of breakage but normally I run this thread with a size 14. These two things have helped me the most with thread breakage on my Innova with these super fine threads.