In-app browser making phone hot and destroying battery life

I am currently on holiday and so only have my iPhone with me. Metamask’s in-app browser generally does what I want it to do: link with sites, but at a terrible performance hit to my battery. It seems, whenever I open a Metamask browser window and don’t then hard close the app it will keep running in the background and ruin my battery life. A look at the Apple settings ‘battery’ page says Metamask frequently is using 50%+ of my battery life, but battery performance is much increased if I close Metamask after every use. Anecdotally it also seems more tabs open means worse battery performance. Is this something you can look into?