Locus destroys barometric altitude data with srtm values
Locus tries to "optimize" barometric altitude data with srtm values. This is wrong. Barometric altitudes are as good as they get, no srtm fiddling can improve that, even with hires data. The steeper your terrain, the worse srtm will be.
Locus altitude manager settings specifically says "optimize GPS altitude values with srtm" and that does indeed make sense. But please do not apply this "optimization" to barometric data, it will only make it worse. Imho barometric values also shouldnt be run through Locus altitude filter.