A "Hooked-in" collection image preview can cause time-out

[GVogeler]

https://www.monasterium.net/mom/IlluminierteUrkundenIllUrkOe/collection is a collection consisting only of charters which are "hooked-in" from https://www.monasterium.net/mom/IlluminierteUrkundenIllUrk/collection. When opening this "hooked-in"-collection in the image-preview (https://www.monasterium.net/mom/IlluminierteUrkundenIllUrkOe/images?block=1) it returns an The query exceeded the predefined timeout and has been killed. [at line 161, column 26] In function: img:years(item()*) eXist-error. The image preview of the master collection (https://www.monasterium.net/mom/IlluminierteUrkunden/images?block=1) is working fine. It is my assumption that this is due to the hooked-in mechanism, but that would have to be investigated.