I'm having the same problem with my 3810X remote. The remote needs new batteries every 2 weeks and it gets really hot when just sitting and then becomes unresponsive.
I literally just replaced my batteries on Saturday with fancy Li-Ion AAs and now today it's already showing dead. This is an older Premier+ but this has just gotten to the point of insanity over the last few months. (Really I can't use the chemical name of these batteries? Nice over-moderation.)
Thanks for the post.
Please send me a PM with your Roku account email address, and include the serial number of the Roku device from Settings>System>About. I'll be able to assist you further from there.
Roku should do a recall as there is obviously a defect in these remotes.
I sent you my serial number but have not had a response.
Do you work for Roku?