It is unlikely to be a 'short cut' ever.
The idea is an 'inner' cannot touch an 'outer'.

This looks to have solved the issue.

Ummm ????
boundary=building? What are you mapping?
relation/12813872.

Still Wrong.
You have to wait a day for OSM Inspector to react.
See https://tools.geofabrik.de/osmi/?view=areas&lon=129.50651&lat=-14.18475&zoom=15

JOSM validator says:
Errors (3)
Multipolygon outer way shares segment with other ring (3)
TestError [tester=org.openstreetmap.josm.data.validation.tests.MultipolygonTest@73b04335, code=1606, message=Multipolygon outer way shares segment with other ring]
TestError [tester=org.openstreetmap.josm.data.validation.tests.MultipolygonTest@73b04335, code=1606, message=Multipolygon outer way shares segment with other ring]
TestError [tester=org.openstreetmap.josm.data.validation.tests.MultipolygonTest@73b04335, code=1606, message=Multipolygon outer way shares segment with other ring]

Multipolygon relations - Should not have the same way in it twice.

See Way: 1007815262 in relation/13497685 and look at https://tools.geofabrik.de/osmi/?view=areas&lon=151.54298&lat=-33.15497&zoom=17

Suggested solution: Delete the way - it serves no function?

Building:part should not encompass the whole of the building outline...

Way: 1007515114.

No communication... no attempt to fix...

Exactly what is 'Jewells - Redhead - Bennetts Green boundary' relation/13447773???

Jewells, Redhead and Bennetts Green are already in as administration boundaries.

The name tag is for the name only, not name=tennis courts ... that is conveyed by sport=tennis!

See osm.wiki/Names#Name_is_the_name_only

JOSM Validator auto fixes used to fix numerous errors in the Telstra Corporate Centre. E.G. 265 nodes deleted.

relation/13485464 wetland is in error.

See https://tools.geofabrik.de/osmi/?view=areas&lon=129.50471&lat=-14.18659&zoom=17

I expect you would be able to fix this?

JOSM validator reports
Errors (2)
Multipolygon outer way shares segment with other ring (2)
TestError [tester=org.openstreetmap.josm.data.validation.tests.MultipolygonTest@3a9bb5c, code=1606, message=Multipolygon outer way shares segment with other ring]
TestError [tester=org.openstreetmap.josm.data.validation.tests.MultipolygonTest@3a9bb5c, code=1606, message=Multipolygon outer way shares segment with other ring]

That has nothing to do with crossing ways. It has to do with "shared segments"

Why is this water way a multipolygon? Relation: 13470856.

The relation has 4 members that join to from a continuous closed way .. yet the roles for the members are both 'inner' and 'outer' which is wrong.

I have combined these into ONE way and put the tags on that way .. and deleted the relation.

The geofabrik runs ~every day .. so you can check it about a day after you make changes to see. The JOSM validator also does some checks too .. see if you have any errors or warnings there before you upload the data to OSM. .

Hi,
A relation's outer way should not cross the same relation's other outer way.

See https://tools.geofabrik.de/osmi/?view=areas&lon=115.51391&lat=-32.00749&zoom=18

Suggest the gun is not a bunker and should be tagged as such.

An 'inner' cannot touch an 'outer'!

See https://tools.geofabrik.de/osmi/?view=areas&lon=151.71332&lat=-33.01061&zoom=18

I leave you to fix this one.

This broke the beach relation!

An 'inner' cannot cross an 'outer'.

Corrected. Rocks now more detailed. Beach extended out to sea - beyond hi water level. There are more rocks that can be added .. if you want.

Thanks.
I keep an eye on the area errors and the public transport route errors.Started so I can pick up my own errors - usually relations, but I now try to keep the general Australian errors down. Where it is a new mapper I usually fix it myself - we all need time to learn. Where it is a more experienced mapper I tend to let them know of the error, particularly where it is repetitive.

Hi,
You would have had a warning message about 'self crossing ways'. These should be fixed before uploading.
Please see https://tools.geofabrik.de/osmi/?view=areas&lon=145.90375&lat=-41.06388&zoom=12

There are some 5 errors there now, there maybe more as the QA tool sifts through the data to d=find more.

I have checked 2 of them and in both cases you are the author of the errors. Please fix them.

The 'Bruce Highway' incorporates many roads with different names - e.g. Yamba Road. This does NOT mean those road names are added to the name of the route.

Kunwarara Rd removed from route name.

I have done a few where they cross a 'road' (alley).

Good luck .. it won't be 'nice'. Possibly select all buildings with you as author (should be able to do that .. but I don't recall the magic potion) and move them as one lot. Then check them at various places.