We are again seeing an issue where calls from ONSIM SIMs are not immediately connecting, and may seem like several call attempts to the recipient. We are chasing ONSIM on this.
Sorry fro the delay on this - we do not seem to have had any complaints from customers on this for some time, but we have not had a final confirmation that it is fully resolved from ONSIM yet, so keeping this issue open for now.
This is being worked on as a (short notice) planned work now.