When using an URL for a server resource pack that points to a web server using a Let's Encrypt certificate the client fails to download the pack. (Stuck at 100% and sending failed resource pack status packet)

Only happens when using the bundled Java runtime which seems to be the 2015 released update 51, error does not happen with the most recent update 201 (seeing as the old version was released before Let's Encrypted being a thing I suspect that version 51 does not include their root certificate in the key/trust store so updating the bundled version or relying on the certificates by the installed java/OS if available could be possible solutions for this issue)

The actual stacktrace is attached.

Edit: I just noticed that I forget to actually provide an example URL that causes this issue: https://cdn.moep.tv/files/Empty.zip