Git 2.26 fails with one filter-spec, detects multiple

When trying to pull www-gitlab-com with one filterspec, Git creates a failure:

~/src/gitlab.com/gitlab-com/www-gitlab-com master ⇣
❯ cat .git/config 
[core]
	repositoryformatversion = 1
	filemode = true
	bare = false
	logallrefupdates = true
[remote "origin"]
	url = git@gitlab.com:gitlab-com/www-gitlab-com.git
	fetch = +refs/heads/*:refs/remotes/origin/*
	promisor = true
	partialclonefilter = blob:limit=1048576
[branch "master"]
	remote = origin
	merge = refs/heads/master
~/src/gitlab.com/gitlab-com/www-gitlab-com master ⇣
❯ g pull
fatal: multiple filter-specs cannot be combined
fatal: the remote end hung up unexpectedly

This seems to be 2.26 specific, as it can't be reproduced on 2.24.