I've been noticing the same thing myself for a while:
# fdisk -l
Disk /dev/sda: 1.4 TiB, 1500301910016 bytes, 2930277168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 78410F99-5523-4B97-9434-ADBBDF60DB07
Device Start End Sectors Size Type
/dev/sda1 2048 401407 399360 195M EFI System
/dev/sda2 401408 2498559 2097152 1G Microsoft basic data
/dev/sda3 2498560 736501759 734003200 350G Microsoft basic data
/dev/sda4 736501760 820387839 83886080 40G Microsoft basic data
/dev/sda5 820387840 853942271 33554432 16G Linux swap
/dev/sda6 853942272 916856831 62914560 30G Microsoft basic data
/dev/sda7 916856832 1650860031 734003200 350G Microsoft basic data
/dev/sda8 1650860032 1713774591 62914560 30G Microsoft basic data
/dev/sda9 1713774592 2447777791 734003200 350G Microsoft basic data
/dev/sda10 2447777792 2449874943 2097152 1G Microsoft basic data
/dev/sda11 2449874944 2930276351 480401408 229.1G Microsoft basic data
Parted, at least, shows it as flags:
# parted
GNU Parted 3.2
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
Model: ATA ST1500DM003-9YN1 (scsi)
Disk /dev/sda: 1500GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 206MB 204MB fat16 EFI System Partition boot, esp
2 206MB 1279MB 1074MB ext3 msftdata
3 1279MB 377GB 376GB ext4 msftdata
4 377GB 420GB 42.9GB ext4 msftdata
5 420GB 437GB 17.2GB linux-swap(v1)
6 437GB 469GB 32.2GB ext4 msftdata
7 469GB 845GB 376GB ext4 msftdata
8 845GB 877GB 32.2GB ext4 msftdata
9 877GB 1253GB 376GB ext4 msftdata
10 1253GB 1254GB 1074MB ext4 msftdata
11 1254GB 1500GB 246GB ext4 msftdata
It is annoying. Seeing Linux ext4 filesystems shown as Microsoft data.