Marketplace worlds loaded on Realms do not correctly load the required resource pack upon joining the realm

Repro Steps:

1. Load a piece of content onto a realm from a marketplace (in this case, this was done on Space Battle Simulator 2 by a user who purchased the content and then invited me to their realm).
2. Try to join the realm

Observed Results:

The resource pack does not load. Curiously, this happens even if the same resource pack has been loaded client-side. This means that almost all in-game text does not load, and nor do any of the in-game particle effects, rendering the map effectively unplayable.

Expected Results:

The map should load normally, with text/particles/etc included.

Screenshots/Video Attached:

No, just picture a bunch of signs with translation strings instead of actual text.

Notes:

For some reason, Jira wouldn't let me select the current 1.14.1 live version, only allowing "Future Release". The bug is on the currently live release, 1.14.1 (build 3561570).