Pinned blueprints randomly disappearing

I've selected all of the needed, and highest grade blueprints at the engineers, and pinned them, for remote engineering. Yet some of the pinned blueprints are gone. Simply the engineers display says no pinned blueprint at some of engineers.
Yesterday, i've unlocked chloe sedesi, and pinned dirty drive tuning. Today when i logged in, it says no pinned blueprint for chloe sedesi...
Luckily i've logged out docked at her port, so i could pin the blueprint again, but for others i need to go there again, and... pinned blueprints could be deleted again...

What should i do?
 
Yes. that was the workaround. Some blueprints needed to pin two times, as first it's lost at first relog.
Another long standing known bug, which will be fixed... ever?
 
unrelated but worth mentioning: If you have an older ship with modules that we're engineered to the old engineering standard then the blueprints will be missing for those modules too, you have to visit the engineer and convert the legacy mod to the new standard before remote workshop will allow you to work on said module.
 
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