Why don't breakpoints work in level blueprints for me?

I have an issue where level blueprints do not trigger blueprint breakpoints in the blueprint debugger.

Other blueprints work as expected, and blueprints called by the level blueprint or in other ways can be debugged. The level blueprints also execute as expected. But no breakpoints in my level blueprint itself will stop the blueprint debugger.

It’s been like this for me in my project for over a year and it’s quite damaging to productivity.

Any help would be appreciated.