galera - seqno in grastate.dat equal to -1

Question

We have Galera with 3 nodes.

Every time I restart the mariadb, it don't come okay and take long time until I manage to make it work again.

When I check the file /var/lib/mysql/grastate.dat, usually (almost always) have -1 in the seqno line

# GALERA saved state
version: 2.1
uuid:    e373e8c7-4c87-154c-ac36-14ebe298b6d1
seqno:   -1
safe_to_bootstrap: 0

Is it okay? Is there something else that I can check Galera?

Thanks.