Comment # 3 on bug 1227282 from Takashi Iwai

My wild guess is that it could be the difference of CONFIG_LSM.

SLE15-SP6 / Leap 15.6 config doesn't contain selinux in its CONFIG_LSM while TW
has both selinux and bpf in CONFIG_LSM, and selinux is defined before bpf.
The kernel appends the LSM specified via security= option if it isn't present,
and that's the case for SLE15-SP6 / Leap 15.6.

ALP-current (SL Micro 6.0) kernel is with CONFIG_LSM containing selinux while
its code base is more or less identical with SLE15-SP6.  Could you verify
whether the problem persists with ALP-current kernel?