Embeded episodes display in Preview mode only

[bwrpodcast]

Country

Poland

Device

PC, Mac, Android

My Question or Issue

We are encountering difficulties embedding Polish podcast episodes. For some reason, you can only see the episodes in Preview mode. We experimented with different shows and here are some observations:

• It only happens in Polish regardless of the subject
• It's not the case for newly published episodes - older episodes have the same issue
• We used English podcasts in testing on the same website and they worked fine
• Same story on a totally different website with the same setup
• Preview only is in Chrome and Opera
• Safari doesn't even load the player
• Firefox works okay

Samples of code:

This one doesn't work: 

<iframe title="Spotify Embed: Dzień 326 - Dlaczego tak trudno uwierzyć" style="border-radius: 12px" width="100%" height="152" frameborder="0" allowfullscreen allow="autoplay; clipboard-write; encrypted-media; fullscreen; picture-in-picture" loading="lazy" data-src="https://open.spotify.com/embed/episode/5hzMswCZgqH6PThD9s2YEM?utm_source=oembed" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="></iframe>

This one works fine:

<iframe title="Spotify Embed: Seeking, Searching and Finding God through Prayer | Season 4, Episode 9" style="border-radius: 12px" width="100%" height="152" frameborder="0" allowfullscreen allow="autoplay; clipboard-write; encrypted-media; fullscreen; picture-in-picture" loading="lazy" data-src="https://open.spotify.com/embed/episode/3LFfovY0NHWE8Mz8GCI1YO?utm_source=oembed" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="></iframe>

Here is an example: https://bibliawrok.pl/podcast/dzien-326-dlaczego-tak-trudno-uwierzyc/

Screenshot: https://share.zight.com/bLuyLJDK