Hello,
1) The filtering works but i have more than 1 Brand selected in products, so they are not showing in widgets. More than one Brand has products. Pictures following:
a) https://gyazo.com/edfae68cb1e214af45666d7709a86845
b) https://gyazo.com/9093d83be8d8ad947813ec177010bee6
2) When we updated to the new version (i restored to the previous version), the widget Masonry categories was missing the h2 tag (probably its in the core plugin). I also share a video capture.
https://gyazo.com/58acbb769712586c5496643e74d0e232
Regards,
Panagiotis