Issues with zpool replace

[waterdevil0]

Hi, every time I try to replace a disk with a few errors, after resilver the new disk gets errors too.
I have tried it with 4 different brand-new disks for two years! In this long time I hoped, that with a new release the issue will be solved and gone.
But this is not so. Now there are more errors and the computer gets very slow with 100% CPU.

My system: uname -a
Linux albiggen 5.4.143-gentoo #1 SMP Tue Sep 7 12:56:32 CEST 2021 x86_64 Intel(R) Xeon(R) Gold 6138 CPU @ 2.00GHz GenuineIntel GNU/Linux

Main board Supermicro

Controller:
lspci -knn -s 17:0.0
17:00.0 Serial Attached SCSI controller [0107]: Broadcom / LSI SAS3224 PCI-Express Fusion-MPT SAS-3 [1000:00c4] (rev 01)
Subsystem: Broadcom / LSI SAS3224 PCI-Express Fusion-MPT SAS-3 [1000:3190]
Kernel driver in use: mpt3sas

zpool version
zfs-2.1.1-r5-gentoo
zfs-kmod-2.1.0-r0-gentoo

zpool status dpool
pool: dpool
state: DEGRADED
status: One or more devices is currently being resilvered. The pool will
continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
scan: resilver in progress since Thu Nov 25 13:27:01 2021
39.2T scanned at 1.22G/s, 35.6T issued at 1.11G/s, 42.0T total
465G resilvered, 84.77% done, 01:38:20 to go
config:

NAME                                            STATE     READ WRITE CKSUM
dpool                                           DEGRADED     0     0     0
  raidz2-0                                      ONLINE       0     0     0
    ata-WDC_WD30EFRX-68AX9N0_WD-WCC1T1492478    ONLINE       0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N0FVSV47    ONLINE       0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N0KC6SUN    ONLINE       0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N1HY49V8    ONLINE       0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N1LL8S72    ONLINE       0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N2YNSZZZ    ONLINE       0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N4RPDK59    ONLINE       0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N5NZVVHH    ONLINE       0     0     0
  raidz2-1                                      DEGRADED     0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N5YNUCTL    ONLINE       0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WCC4N7KUPX7F    ONLINE       0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0N4SL9K    ONLINE       0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0N59P4W    ONLINE       0     0     0
    ata-WDC_WD80EFAX-68KNBN0_VDH9D96D           ONLINE       0     0     0
    replacing-5                                 UNAVAIL      4    10    29  insufficient replicas
      ata-WDC_WD40EFAX-68JH4N0_WD-WX12D10KPEPH  FAULTED      0 1.30K     0  too many errors  (resilvering)
      ata-WDC_WD40EFAX-68JH4N0_WD-WX21DB9KC4E6  FAULTED      4    13     0  too many errors  (resilvering)
    ata-WDC_WD80EFAX-68KNBN0_VDH9DVZD           ONLINE       0     0     0
    ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N1376540    ONLINE       0     0     0
logs	
  nvme0n1p6                                     ONLINE       0     0     0
  nvme1n1p3                                     ONLINE       0     0     0
cache
  nvme1n1p2                                     ONLINE       0     0     0
  nvme0n1p5                                     ONLINE       0     0     0

errors: No known data errors

How can I find the cause - or is it maybe a bug?
I hope for your advice.
Best regards
and many thanks in advance

[waterdevil0]

Opened again in issues.
Sorry, but I can't delete this now double posting.