So summarizing you have two options currently:
- stay on v4 - use AdGuard DNS as long as it works, otherwise change to your ISP for that time.
- update to v5 - use AdGuard DNS while it works, if it doesn’t use another DNS which is DoH but doesn’t block content.
In both cases Tasker (or a similar app for example Automate) could come in handy: they can turn off Blokada as soon as you are on cellular data. A guide on how that works can be found here: