7.19.1 l2tp clients disappear

After 7.19.1 update on my rb3011 all l2tp-ipsec clients suddenly disconnect and no more reconnect, one or more times a day.
Log shows all clients reconnection attempts with no success.
I have to disable and enable again l2tp server to have clients connected.
Is there something I can check before wasting support team time with a minor ticket ?

  1. Show the export settings on this router in text form. Remove passwords and serial numbers from it.
  2. Do the ROS and firmware versions match on this router?

Yes, firmware and rOS are the same version
It seems stable, for now, wiping few unused ipsec policies, proposals and profiles
They were there, anyway, sleeping and all was working fine pre-7.19.1…