Android phone manufacturers listed below kill your apps even when Google recommends that they should not do that.
They make changes to the core Android OS with the expectation that it will improve battery life, but not only are those changes not even very effective, but they also break well-written battery-efficient apps.
— from DontKillMyApp.com.
Starting in v16, Hermit keeps a cache of all your Lite App definitions in memory to speed up launching when you click a link. This takes up very little memory, since it’s only a list of domains. This cached list is used to figure out which Lite App to use to open a link. E.g. if you click a link to “https://twitter.com/…“, Hermit consults this cached list to determine that the link should be opened in the Twitter Lite App.
If Hermit is continuously being killed on your device, then this cached list has to be re-read from storage every time you click a link or open a Lite App from your home screen, which slows down the app startup every single time.
If you have a phone from one of these manufacturers, please visit the relevant links at dontkillmyapp.com (a site developed and maintained by a group of other app developers) to understand the issue and fix it on your phone.