Mongoid/Mongodb issues after upgrade to 4.3

[dotsi]

After upgrading to the latest engine version 4.3 we are having issues pushing some resources from wagon to engine.
I traced the issue to some breaking changes in how Mongoid handles operator combinations since 7.1:
https://www.mongodb.com/docs/mongoid/7.5/reference/queries/#operator-combinations

This named scope produces a different result on the 4.3 version of the engine:
scope :by_id_or_slug, ->(id_or_slug) { all.or({ _id: id_or_slug }, { slug: id_or_slug }) }

Test from the Rails console:
irb(main):028:0> site.sections.by_id_or_slug("hero").size=> 47

irb(main):029:0> site.sections.where(slug: "hero").or(_id: "hero").size=> 1

irb(main):030:0> site.sections.by_id_or_slug("hero").selector=> {"site_id"=>BSON::ObjectId('5ebfc39e232fb906a3dfc34b'), "$or"=>[{"site_id"=>BSON::ObjectId('5ebfc39e232fb906a3dfc34b')}, {"_id"=>"hero"}, {"slug"=>"hero"}]}

irb(main):031:0> site.sections.where(slug: "hero").or(_id: "hero").selector=> {"$or"=>[{"site_id"=>BSON::ObjectId('5ebfc39e232fb906a3dfc34b'), "slug"=>"hero"}, {"_id"=>"hero"}]}

The previous engine versions produce a selector like this:
2.5.1 :010 > silte.sections.by_id_or_slug("image_bg").size => 1
2.5.1 :011 > silte.sections.by_id_or_slug("image_bg").selector => {"site_id"=>BSON::ObjectId('5c82be9824d35f685b3b632f'), "$or"=>[{"_id"=>"image_bg"}, {"slug"=>"image_bg"}]}

This is the one place I found the issue. Probably there are other places.
Right now the only solution I see is to downgrade back to 4.1.1 until this is patched.