PS4 Bedrock marketplace purchase not syncing with Switch Bedrock, and vice versa, using same Microsoft account

I'm having trouble getting my purchases to sync between my PS4 and Switch copies of Minecraft. Both are updated to the latest version of Bedrock, and both are signed in to the same Microsoft account. Viewing content on my Switch which I've already purchased on my PS4 (e.g. the official Minecraft/Mojang steampunk and fantasy texture packs) prompts me to purchase them again, and vice versa. All content in question is available on both storefronts (exclusive to neither platform) and is official Minecraft/Mojang content, rather than from a third-party creator. I've tried logging out and back into my Microsoft account, restarting the game, etc. on both consoles, and no luck.