After some VERY frustrating experiences with this task i stumbled upon this:
https://gryzli.info/2015/01/18/mikrotik-managing-firewall-by-cli/
You MUST do /ip firewall filter print before actually moving the rule. Useless to say it’s annoying when running batches with dsh or putty.
So you rsc would be:
/ip firewall filter print
/ip firewall filter move [find where comment =“blabla”] destination=32
Or in a single line: ‘/ip firewall filter print; /ip firewall filter move [find where comment =“blabla”] destination=32’