Hello experts,
Having an entity with a date field inserted/updated via a SAPUI5 dialog. After some consecutive updates (changes on the date via the datepicker) on the same record, I experience this weird error. I say weird because I don't have this kind of check inside my update entity. In fact the update entity method does nothing more than performing a couple of simple checks in other fields and eventually inserting the record, no calls to BAPIs, standard SAP function modules or anything. Also weird the fact that it doesn't happen always. Spent half the day repeating the same motif, just consecutive updates with debug, sometimes it happens, sometimes not. No exception occurs in my method, error comes from standard SAP after the end of get_entityset which follows the update. If helpful, I attach a snapshot of the batch operations involved.

And it gets better! After the application crashes, never opens again, it actually produces during the load of the initial worklist (get_entityset method) a variation of the aforementioned error (Message E FK 080 cannot be processed in plugin mode HTTPS). Application stops crashing...as soon as I delete the record from the database.
Record looks just fine in SE16N and gateway client works fine when I test the get_entityset method. Cleared all cache in the system (used this: https://blogs.sap.com/2016/03/02/cache-maintenance-in-fiori/), cleared even the browser cache (yeah, I know that doesn't make sense) but problem persists. I use model.submitChanges to update, no change groups involved.
Does this ring any bells to anyone?
Best regards
Greg