Platform, device version and operating system
PC/Mobile
What you were expecting to happen, and what actually happened
After starting a delve event (=spending a delve sigil), the difficulty setting from explore/quest battles is reset to normal. I expect the delve not to influence the difficulty setting.
How often does this happen? When did it begin happening?
100% reproducible
Steps to make it happen again
Play an explore game on difficulty warlord 4.
Switch to delve event and spend a delve sigil to start a new delve.
Switch back to explore and check your difficulty setting. It is reset to normal