Px-etcd: Kernel error /source/fs/fs-writeback.c:2337

I have the problem that my VM guest coreos (running Kubernetes) throwing kernel errors all the time.
The system is running and Portworx status is all green and everything is working, but…

System:
Container Linux by CoreOS stable (2023.5.0)
4.19.25-coreos #1 SMP Sat Mar 9 01:05:06 -00 2019 x86_64 QEMU Virtual CPU version 2.5+ AuthenticAMD GNU/Linux

Running on Ubuntu 18.04 KVM Host:
qemu 1:2.11+dfsg-1ubuntu7.12

Portworx:
portworx/px-enterprise:2.0.3.3

Installed on Kubernetes 1.13.15 with:
https://install.portworx.com/?mc=false&kbver=1.13.5&b=true&j=auto&c=flxc-staging-a5e251bf-a665-420e-85ed-9a2d320baca2&stork=true&lh=true&st=k8s

Kernel error (every few seconds):
[40302.956647] WARNING: CPU: 3 PID: 5370 at …/source/fs/fs-writeback.c:2337 __writeback_inodes_sb_nr+0xc1/0xd0
[40302.961390] Modules linked in: xt_set xt_multiport iptable_mangle iptable_raw ip_set_hash_ip ip_set_hash_net ipip tunnel4 ip_tunnel tcp_diag udp_diag inet_diag unix_diag af_packet_diag netlink_diag veth xt_statistic xt_nat ipt_REJECT nf_reject_ipv4 ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs ip6table_nat nf_nat_ipv6 ip6_tables xt_comment xt_mark ipt_MASQUERADE nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo iptable_nat nf_nat_ipv4 xt_addrtype iptable_filter xt_conntrack nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge stp llc overlay dm_thin_pool dm_persistent_data dm_bio_prison xfs px(OE) nls_ascii nls_cp437 vfat fat mousedev kvm_amd kvm psmouse i2c_piix4 i2c_core button virtio_balloon irqbypass evdev sch_fq_codel ext4 crc16 mbcache jbd2 fscrypto btrfs xor zstd_decompress zstd_compress
[40302.980694] xxhash lzo_compress dm_verity dm_bufio raid6_pq libcrc32c crc32c_generic uhci_hcd ata_piix virtio_net ehci_pci libata net_failover ehci_hcd failover scsi_mod usbcore virtio_blk virtio_console usb_common qemu_fw_cfg dm_mirror dm_region_hash dm_log dm_mod
[40302.988725] CPU: 3 PID: 5370 Comm: px-etcd Tainted: G W OE 4.19.25-coreos #1
[40302.991160] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
[40302.993805] RIP: 0010:__writeback_inodes_sb_nr+0xc1/0xd0
[40302.996508] Code: 0f b6 d1 e8 71 fc ff ff 48 89 ee 48 89 df e8 d6 e1 ff ff 48 8b 44 24 48 65 48 33 04 25 28 00 00 00 75 0b 48 83 c4 50 5b 5d c3 <0f> 0b eb ca e8 46 75 e0 ff 66 0f 1f 44 00 00 66 66 66 66 90 31 c9
[40303.004176] RSP: 0018:ffffb1e945493d98 EFLAGS: 00010246
[40303.005569] RAX: 0000000000000000 RBX: ffff95cddf7e5c00 RCX: 0000000000000000
[40303.007346] RDX: 0000000000000002 RSI: 000000000001106e RDI: ffff95cde32e3800
[40303.009169] RBP: ffffb1e945493d9c R08: 0000000000000000 R09: ffffb1e945493d98
[40303.010964] R10: 0000000000004000 R11: 0000000000003000 R12: ffff95cb56398200
[40303.012964] R13: ffff95cd97d0b1f0 R14: ffff95cd97d0b218 R15: ffff95cd6d116470
[40303.015409] FS: 00007ff00e7fc700(0000) GS:ffff95cdebac0000(0000) knlGS:0000000000000000
[40303.019795] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[40303.021453] CR2: 00007ff26f2ca038 CR3: 0000000522f40000 CR4: 00000000000006e0
[40303.023498] Call Trace:
[40303.024399] btrfs_commit_transaction+0x708/0xc00 [btrfs]
[40303.026000] ? dput+0x96/0x110
[40303.026982] ? btrfs_log_dentry_safe+0x54/0x70 [btrfs]
[40303.028462] btrfs_sync_file+0x31b/0x940 [btrfs]
[40303.029753] do_fsync+0x38/0x60
[40303.030730] __x64_sys_fdatasync+0x13/0x20
[40303.031885] do_syscall_64+0x4e/0x100
[40303.033008] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[40303.034381] RIP: 0033:0x4d15d0
[40303.035446] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
[40303.040313] RSP: 002b:000000c42030d318 EFLAGS: 00000212 ORIG_RAX: 000000000000004b
[40303.042674] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004d15d0
[40303.044657] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000b
[40303.047740] RBP: 000000c42030d360 R08: 0000000000000000 R09: 0000000000000000
[40303.052720] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff
[40303.055805] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000017
[40303.057740] —[ end trace 34b85f625346855d ]—