A small update: i moved the patch from folder std one folder back, now it is compiled and I receive the log messages from the patch.
This means my past observations where still without patch, it doesn't seem to disconnect anymore. 
Wed Jul 30 12:29:42 2025 daemon.notice hostapd: PMK - hexdump(len=32): [REMOVED]
Wed Jul 30 12:29:42 2025 daemon.notice hostapd: Found matching PSK (keyid='', vlan_id=0)
Wed Jul 30 12:29:42 2025 daemon.debug hostapd: phy1-ap0: STA xx:xx:xx:xx:xx WPA:
FT authentication already completed - do not start 4-way handshake