After replacing a disk and resilvering pool is still in degraded status and drive says it's still replacing

Hi,

In recent weeks two (/dev/ada3 & /dev/ada5) of my eight drives started to report more and more bad sectors and errors so I've decided to replace them.
I followed official instructions for replacing a failed disk https://www.ixsystems.com/documentation/freenas/11.3-U1/storage.html#replacing-a-failed-disk

I've done all of those steps via GUI:
* changed the faulty /dev/ada3 disk status to OFFLINE
* shutdown the system
* physically replaced the failing drive with a...

After replacing a disk and resilvering pool is still in degraded status and drive says it's still replacing