If it's Stretch related, then we are too fast with it even for a server builds.
Somebody has to take the lead and I left this task to @Tido and things are not running smoothly yet. Also because of breaking releases into two parts. We did quick testing on critical stuff and the team testing part was left for 4.14.y update. This was kind of compromise and give some time to prepare: the vital job description of "team tester leader" is to ping people from time to time, otherwise, they just don't react on "you have been assigned to the task of testing this and that.
My emails are up to 3 weeks behind and I can't possibly cover more one2one communication. Eiter we help @Tido to get this up and running or come up with a better plan.