'Colour by', 'Sort rows by' or 'Sort columns by' dropdown disappear after the first click

[datasome]

On https://www.ebi.ac.uk/chembl/g/#browse/compounds/filter/_metadata.related_assays.all_chembl_ids%3ACHEMBL2093851%20AND%20molecule_properties.full_mwt%3A(%3E%3D444.4%20AND%20%3C%3D463.15), when I first click on any of the following dropdowns: 'Colour by', 'Sort rows by' or 'Sort columns by', the dropdown appears and quickly disappears. I always have to click again to see it so that it stays displayed and I'm able to select from it (Have tested it on Chrome)