I have a question is it in policy of mikrotik company during upgrade of firmware completely brake configuration which was working on previous version ?
For example today i upgraded production router CCR 1036 to bugfix release. And after reboot Ovpn stopped to work with TLS error, Firewall filter rules disappeared at all.
I have tons connections which using certificates on this router. Are you fucking joking guys ?
WTF ?
What issue did the CCR have before you upgraded it?
Always make backup before changing something on the router.
There are no known issues that could cause something like this. Maybe something went wrong during upgrade process, NAND is damaged or something like that.