Problems with trash and partitions about trash-cli HOT 5 CLOSED

$ mount 
/dev/sdb5 on / type ext4 (rw,noatime,discard,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
/dev/sdb6 on /home type ext4 (rw,noatime,discard)
/dev/sda2 on /HDD type ext4 (rw,noatime)
/HDD/.SDDsymlinks/var/tmp on /var/tmp type none (rw,bind)
/HDD/.SDDsymlinks/var/log on /var/log type none (rw,bind)
/HDD/.SDDsymlinks/var/cache on /var/cache type none (rw,bind)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
$ ls -lad /
drwxr-xr-x 26 root root 4096 Apr 10 11:27 /
$ ls -lad /home/
drwxr-xr-x 5 root root 4096 Dec 16 20:32 /home/
$ ls -lad /home/protist/
drwxr-x--- 93 protist protist 4096 Apr 18 06:49 /home/protist/
$ ls -lad /home/protist/HDD/
drwxr-x--- 10 protist protist 4096 Apr 12 15:55 /home/protist/HDD/
$ ls -lad /home/protist/.local/share/Trash
lrwxrwxrwx 1 protist protist 49 Dec 18 19:39 /home/protist/.local/share/Trash -> /HDD/protist/.SDDsymlinks/home/protist/.local/share/Trash

lrwxrwxrwx 1 protist protist 49 Dec 18 19:39 /home/protist/.local/share/Trash -> /HDD/protist/.SDDsymlinks/home/protist/.local/share/Trash

$ mount
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
sys on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
dev on /dev type devtmpfs (rw,nosuid,relatime,size=8162056k,nr_inodes=2040514,mode=755)
run on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)
/dev/sdb7 on / type ext4 (rw,relatime,errors=remount-ro,data=ordered)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/net_cls type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=22,pgrp=1,timeout=300,minproto=5,maxproto=5,direct)
mqueue on /dev/mqueue type mqueue (rw,relatime)
configfs on /sys/kernel/config type configfs (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime)
tmpfs on /tmp type tmpfs (rw)
/dev/sdb8 on /home type ext4 (rw,relatime,data=ordered)
/dev/sda2 on /HDD type ext4 (rw,relatime,data=ordered)
/dev/sda2 on /var/cache type ext4 (rw,relatime,data=ordered)
/dev/sda2 on /var/log type ext4 (rw,relatime,data=ordered)
/dev/sda2 on /var/tmp type ext4 (rw,relatime,data=ordered)
tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,size=1632972k,mode=700,uid=1000,gid=1000)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
$ ls -lad /
drwxr-xr-x 18 root root 4096 Jun  5 01:22 /
$ ls -lad /home/
drwxr-xr-x 5 root root 4096 May 21 15:31 /home/
$ ls -lad /home/protist/
drwxr-x--- 115 protist protist 4096 Jun  5 16:52 /home/protist/
$ ls -lad /home/protist/HDD/
drwxr-x--- 10 protist protist 4096 Jun  5 16:53 /home/protist/HDD/
$ ls -lad /home/protist/.local/share/Trash
lrwxrwxrwx 1 protist protist 49 Jun  5 17:04 /home/protist/.local/share/Trash -> /HDD/protist/.SDDsymlinks/home/protist/.local/share/Trash

$ cd ~
$ touch foo
$ trash foo # works
$ cd ~/HDD
$ touch foo
$ trash foo # fails
trash: cannot trash regular empty file `foo'
$ trash ./foo # fails
trash: cannot trash regular empty file `./foo'
$ trash ~/HDD/foo # works
$ touch foo
$ cd ..
$ trash HDD/foo # works