That behaviour was always present, even on TS3 servers. Like discussed earlier this year, we are still working on how we handle licenses with TS6.
2025-10-16 15:54:44.651851|INFO |ServerLibPriv | |TeamSpeak 3 Server 3.13.7 (2022-06-20 12:21:53)
2025-10-16 15:54:44.652852|INFO |ServerLibPriv | |SystemInformation: Windows 10 (22000) x64 (AMD or Intel) Binary: 64bit
2025-10-16 15:54:44.652852|INFO |ServerLibPriv | |Using hardware aes
2025-10-16 15:54:44.665864|INFO |DatabaseQuery | |dbPlugin name: SQLite3 plugin, Version 3, (c)TeamSpeak Systems GmbH
2025-10-16 15:54:44.665864|INFO |DatabaseQuery | |dbPlugin version: 3.11.1
2025-10-16 15:54:44.667865|INFO |DatabaseQuery | |checking database integrity (may take a while)
2025-10-16 15:54:44.696641|WARNING |Accounting | |Unable to open licensekey.dat, falling back to limited functionality