I was wrong, in fact this is fixed by
``` commit 02240711239149e2f5c4890a70ab158d10fa8187 Author: Daniel-Constantin Mierla miconda@gmail.com Date: Sat May 8 23:30:22 2021 +0200 tcpops: use fixup_igp_all() instead of fixup_igp_null() - needed for functions with many parameters ``` but it is not in 5.5.0