Unable to use smartcard with gnupg 2.4

Description:

After upgrading from GnuPG 2.2.41-2 to 2.4.3-2 GnuPG is unable to access my PGP SmartCard. Downgrading and restarting the machine helps to restore the functionality.

Usually the device is detected here:

> echo scd getinfo reader_list | gpg-connect-agent --decode
D 0A5C:5843:0123456789ABCD:0
D 0A5C:5843:0123456789ABCD:0
D
D Broadcom Corp 58200 [Contacted SmartCard] (0123456789ABCD) 00 00
D Broadcom Corp 58200 [Contactless SmartCard] (0123456789ABCD) 01 00
OK

The last two entries disapear in 2.4.3. So then everywhere the smart card is required it is not found. E.g. when trying to use a key I just get the dialog "Please insert the card with serial number: ***". Also

> gpg --card-status
gpg: selecting card failed: No such device
gpg: OpenPGP card not available: No such device

I cannot find anything in the logs regarding the problem.

Upstream bug report: https://dev.gnupg.org/T6871

gpg-agent.conf:

pinentry-program /usr/bin/pinentry-qt
no-grab
default-cache-ttl 1800
enable-ssh-support

gpg.conf:

default-recipient-self
use-agent
default-key 75ED05CE597669ED821DC9530645C440998B6B9A
personal-digest-preferences SHA256
cert-digest-algo SHA256
default-preference-list SHA512 SHA384 SHA256 SHA224 AES256 AES192 AES CAST5 ZLIB BZIP2 ZIP Uncompressed
keyserver hkps://keys.openpgp.org
keyserver-options auto-key-retrieve no-include-revoked no-honor-keyserver-url
keyid-format 0xlong
with-fingerprint
no-emit-version