Thanks for the follow-up Asterix201252, I have acquired your save files and images and created a new case for our Anno team to look into, to see if it is intended that after an update or DLC launch, resources, and their locations on the islands can change, even if playing on the same world seed.
We will do our best to update you when we have more information, or our QA team may need to ask you some more questions.
Thanks for the bug report!
@asterix201252 Thank you for your reply. We have had an update from the game team that this seed behavior is working as intended. Your feedback has been passed on already about this.
If you need anything else please let us know.
Thank you.
Hey @Asterix201252, thanks for your detailed response!
I do understand where you're coming from, however it would be a little tricky to go into detail about this by outlining the reasons behind certain decisions or establish a little more direct way of communication, however to try and answer what you've asked, each time a new fertility set is added/removed, the random shuffling will change by design and is something that will occur when entering the new session for the first time, however if that happens after a GU changes the data, new things will be chosen.
I do hope you will find this useful and if there's any particular feedback or suggestions you'd like to share about this, or if you have any further queries, let us know and we will take it from there!
Going forward, if a future GU is going to affect fertilities like this, would it be possible to mention it in the Release Notes?
Will keep that in mind, yeah. Generally speaking, any time the fertilities are touched by an update in some way, there'll be change - as Ubi-Karl mentioned above.
In most cases, I would assume players won't notice as long as they aren't in such a specific situation as you 
@asterix201252
Glad we were able to help answer this for you and thanks for your kind words about the series! Cheers!
Hey @Asterix201252, thanks for getting back there and apologies about the delayed response from our team.
In regards to items from Tourist Season or High Life not being available to purchase until researched is something that has been indeed addressed and we did not seem to have any contacts about it afterwards.
To add, if you have been using an older save file (prior to update taking place), this will most likely be the reason for it and I think it may be a little tricky one to address.
Just to check, although not necessary, did you notice whether this also occurs if you start a new game?
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