Accessibility turned back off - how to keep it on?

I'm using the app 'Automate', in order for it to work I have to turn it on in Settings/Accessibility: But after a short time I doesn't work anymore and it's back on 'off' again. I think it may have something to do with my battery saving mode because I've seen it in a different question but no idea how to fix it because my gui doesn't have the same properties as suggested in an answer I've seen somewhere else. I'm using an Honor 9 phone from Huawei, my software versions: So my question is: **How can I prevent my phone from changing the app's accessibility setting without giving up on the battery saving feature (if that is the reason for it)?**