Hmmm, a mystery. I cannot recreate the result you're getting without doing something like checking the "elected out of SDA for this property" checkbox (which overrides the "SDA 1=yes" line immediately above it). I can make it not qualify for bonus depreciation (business use % too low), but that doesn't give the same amount of regular depreciation.

If you press Ctrl+W while on that asset in the depreciation screen, do you have an entry with code 488? If so, delete it. (Ctrl+W again will get you back into normal input.)

I suspect that emailing the return to support is the way to go - this is something you-specific, which sometimes is "there's accidentally a random box checked" and sometimes "Lacerte breaks only when faced with the combination of entries you have." It is really, really odd that you're getting the same result across multiple years, though.