[Magisk] bluesguy_1:
Thank you! It appears that the only thing that's mounted f2fs is the magisk stuff, so it's possible that's where the problem is? This moto uses ext4 for all its partitions (e.g. /dev/block/mmcblk0pxx). The module notes specifically describe it as a problem with devices using f2fs for their data partitions:

I suppose that doesn't automatically mean the kernel motorola uses on this device doesn't have the bug though, especially if this problem is already documented.

I'll look into that module and see if it makes sense to test. Thanks again!

Here's the output from mount on my Moto E4 (qualcomm version):

rootfs on / type rootfs (ro,seclabel,size=860828k,nr_inodes=99806)
tmpfs on /dev type tmpfs (rw,seclabel,nosuid,relatime,size=943908k,nr_inodes=104482,mode=755)
devpts on /dev/pts type devpts (rw,seclabel,relatime,mode=600)
none on /dev/cpuctl type cgroup (rw,relatime,cpu)
adb on /dev/usb-ffs/adb type functionfs (rw,relatime)
proc on /proc type proc (rw,relatime,gid=3014,hidepid=2)
sysfs on /sys type sysfs (rw,seclabel,relatime)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,seclabel,relatime)
pstore on /sys/fs/pstore type pstore (rw,seclabel,relatime)
none on /acct type cgroup (rw,relatime,cpuacct)
tmpfs on /mnt type tmpfs (rw,seclabel,relatime,size=943908k,nr_inodes=104482,mode=755,gid=1000)
/data/media on /mnt/runtime/default/emulated type esdfs (rw,nosuid,nodev,noexec,relatime,upper=0:1015:660:771,derive=multi,noconfine)
/data/media on /mnt/runtime/read/emulated type esdfs (rw,nosuid,nodev,noexec,relatime,upper=0:9997:640:750,derive=multi,noconfine)
/data/media on /mnt/runtime/write/emulated type esdfs (rw,nosuid,nodev,noexec,relatime,upper=0:9997:640:770,derive=multi,noconfine)
/dev/block/vold/public:179,65 on /mnt/media_rw/0000-0000 type exfat (rw,dirsync,nosuid,nodev,noexec,relatime,uid=1023,gid=1023,fmask=0007,dmask=0007,allow_utime=0020,namecase=0,errors=remount-ro)
/dev/block/vold/public:179,65 on /mnt/secure/asec type exfat (rw,dirsync,nosuid,nodev,noexec,relatime,uid=1023,gid=1023,fmask=0007,dmask=0007,allow_utime=0020,namecase=0,errors=remount-ro)
/mnt/media_rw/0000-0000 on /mnt/runtime/default/0000-0000 type esdfs (rw,nosuid,nodev,noexec,relatime,upper=0:1015:660:771,derive=public,noconfine)
/mnt/media_rw/0000-0000 on /mnt/runtime/read/0000-0000 type esdfs (rw,nosuid,nodev,noexec,relatime,upper=0:9997:644:755,derive=public,noconfine)
/mnt/media_rw/0000-0000 on /mnt/runtime/write/0000-0000 type esdfs (rw,nosuid,nodev,noexec,relatime,upper=0:9997:644:755,derive=public,noconfine)
none on /config type configfs (rw,relatime)
/dev/block/mmcblk0p53 on /system type ext4 (ro,seclabel,relatime,discard,data=ordered)
/dev/block/mmcblk0p52 on /cache type ext4 (rw,seclabel,nosuid,nodev,noatime,data=ordered)
/dev/block/mmcblk0p30 on /persist type ext4 (rw,defcontext=u:object_r:persist_file:s0,seclabel,nosuid,nodev,relatime,data=ordered)
/dev/block/mmcblk0p22 on /dsp type ext4 (ro,defcontext=u:object_r:adsprpcd_file:s0,seclabel,nosuid,nodev,relatime,data=ordered)
/dev/block/mmcblk0p19 on /firmware type ext4 (ro,context=u:object_r:firmware_file:s0,nosuid,nodev,relatime,data=ordered)
/dev/block/mmcblk0p51 on /oem type ext4 (ro,context=u:object_r:oemfs:s0,nosuid,nodev,relatime,data=ordered)
/dev/block/mmcblk0p29 on /fsg type ext4 (ro,context=u:object_r:fsg_file:s0,nosuid,nodev,relatime)
[b]/dev/block/dm-0 on /data type f2fs (rw,seclabel,nosuid,nodev,noatime,nodiratime,background_gc=on,discard,user_xattr,inline_xattr,acl,inline_data,nobarrier,extent_cache,active_logs=6)
tmpfs on /sbin type tmpfs (rw,seclabel,relatime)[/b]
/dev/block/mmcblk0p53 on /sbin/.core/mirror/system type ext4 (ro,seclabel,relatime,discard,data=ordered)
[b]/dev/block/dm-0 on /sbin/.core/mirror/bin type f2fs (rw,seclabel,nosuid,nodev,noatime,nodiratime,background_gc=on,discard,user_xattr,inline_xattr,acl,inline_data,nobarrier,extent_cache,active_logs=6)
/dev/block/dm-0 on /sbin/.core/db-0/magisk.db type f2fs (rw,seclabel,nosuid,nodev,noatime,nodiratime,background_gc=on,discard,user_xattr,inline_xattr,acl,inline_data,nobarrier,extent_cache,active_logs=6)[/b]
tmpfs on /storage type tmpfs (rw,seclabel,relatime,size=943908k,nr_inodes=104482,mode=755,gid=1000)
/data/media on /storage/emulated type esdfs (rw,nosuid,nodev,noexec,relatime,upper=0:9997:640:770,derive=multi,noconfine)
/mnt/media_rw/0000-0000 on /storage/0000-0000 type esdfs (rw,nosuid,nodev,noexec,relatime,upper=0:9997:644:755,derive=public,noconfine)
tmpfs on /storage/self type tmpfs (rw,seclabel,relatime,size=943908k,nr_inodes=104482,mode=755,gid=1000)