How to properly update container sizes when extending kvm/libvirt disk when running into "... smaller then corresponding PV size" error?

I work on a Debian buster system as a KVM/libvirt host and followed this guide to extend the disk of my guest: https://computingforgeeks.com/how-to-extend-increase-kvm-virtual-machine-disk-size/ .

When extending the disk of a kvm/libvirt guest from 50G to 200G, after rebooting the guest I get the error:

WARNING: Device /dev/sda5 has size of 103854080 sectors which is smaller than corresponding PV size of 418426880 sectors. Was device resized?

The last thing I did before the reboot was to resize the LV, after extending the PV.

I would have expected to be able to resize the partition and then the filesystem, but I am not. I guess the LVM is confused about its size. How can I get it to update the size info of the different containers (physical volume, logical volume, volume group, partion)?

this is the diagnostic output i get:

 pvs
  WARNING: Device /dev/sda5 has size of 103854080 sectors which is smaller than corresponding PV size of 418426880 sectors. Was device resized?
  One or more devices used as PVs in VG cosa-cloud-vg have changed sizes.
  PV         VG            Fmt  Attr PSize    PFree
  /dev/sda5  cosa-cloud-vg lvm2 a--  <199.52g 5.00g

 vgs
  WARNING: Device /dev/sda5 has size of 103854080 sectors which is smaller than corresponding PV size of 418426880 sectors. Was device resized?
  One or more devices used as PVs in VG cosa-cloud-vg have changed sizes.
  VG            #PV #LV #SN Attr   VSize    VFree
  cosa-cloud-vg   1   2   0 wz--n- <199.52g 5.00g

lvs
  WARNING: Device /dev/sda5 has size of 103854080 sectors which is smaller than corresponding PV size of 418426880 sectors. Was device resized?
  One or more devices used as PVs in VG cosa-cloud-vg have changed sizes.
  LV     VG            Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root   cosa-cloud-vg -wi------- 193.56g
  swap_1 cosa-cloud-vg -wi-a----- 980.00m

 fdisk -l
Disk /dev/sda: 200 GiB, 214748364800 bytes, 419430400 sectors
Disk model: QEMU HARDDISK
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xf64fd2c9

Device     Boot   Start       End   Sectors  Size Id Type
/dev/sda1  *       2048    999423    997376  487M 83 Linux
/dev/sda2       1001470 104855551 103854082 49.5G  5 Extended
/dev/sda5       1001472 104855551 103854080 49.5G 8e Linux LVM


Disk /dev/sdb: 4 GiB, 4294967296 bytes, 8388608 sectors
Disk model: QEMU HARDDISK
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/cosa--cloud--vg-swap_1: 980 MiB, 1027604480 bytes, 2007040 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


(parted) print
Model: QEMU QEMU HARDDISK (scsi)
Disk /dev/sda: 419430400s
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number  Start     End         Size        Type      File system  Flags
 1      2048s     999423s     997376s     primary   ext2         boot
 2      1001470s  104855551s  103854082s  extended
 5      1001472s  104855551s  103854080s  logical                lvm

Note the discrepancy between fdisk and parted regarding the disk size (200G vs 215G). Not sure what that means.