Brush on matt varnish help

Have been happily using a bottle of Vallejo of Matt varnish for a while - find it really useful to dull down areas where washes or contrasts have ended up a bit shinier than I look (plus the extra chip protection is always nice).

Have bought a new bottle, slightly updated design but same number and it doesn’t seem to have the same Matt effect and make things look glossier if anything.

Has the recipe change and/or are there any other varnishes that have a proper Matt effect worth trying?