@juergh given the Pi 3A+, 3B+, and 4B share the same wifi chipset (but not the 3B) I'd expect similar behaviour across those three models, if indeed the firmware is the issue.
@juergh given the Pi 3A+, 3B+, and 4B share the same wifi chipset (but not the 3B) I'd expect similar behaviour across those three models, if indeed the firmware is the issue.