Sounds like the same study in both articles? And the BBC says it was specifically to ‘premium’ plastic tea bags?
The fabric ones should be fine then?
Edit: sealed with PLA which is industrially compostable, but not home compostable : https://www.yorkshiretea.co.uk/our-packaging No mention of how bad it is to consume.
Dropping as in no longer using, rather than dropping it on the table and walking out.
Good news.