I noticed a weird behaviour with a WMS request based on EPSG:4326, when the BBOX exeeds the [-180 ; +180] longitude intervalle.
We bump into this problem when we try to display images over the antimeridian line.

I could observe this problem with the "MapServer Demonstration Server".

Environment

Alma Linux V8.10
Mapserver V8.2.0

Actual behavior

Mapserver response is not consistent whether the BBOX overlaps eastward or westward :

1. Westward
   BBOX=-90,-200,90,100
   The image is clipped on both east and west sides, that is in the [-180° ; +100°] longitude intervalle.
   On the west side, pixels in the [-200° ; -180°] longitude intervalle are transparent.

The complete request URL is :
https://demo.mapserver.org/cgi-bin/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&BBOX=-90,-200,90,100&CRS=EPSG:4326&WIDTH=953&HEIGHT=480&LAYERS=bluemarble&STYLES=&FORMAT=image/png&TRANSPARENT=true&STYLES=

2. Eastward
   BBOX=-90,-100,90,200
   The image is clipped on the west side, which is OK.
   On the east side, pixels in the [+180°; +200°] longitude intervalle are not correct.

The complete request URL is :
https://demo.mapserver.org/cgi-bin/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&BBOX=-90,-100,90,200&CRS=EPSG:4326&WIDTH=953&HEIGHT=480&LAYERS=bluemarble&STYLES=&FORMAT=image/png&TRANSPARENT=true&STYLES=

Expected

At least, I would expect to have the same behaviour on both sides of the antimeridian.

Furthermore, couldn't we get the "repeated world" on the [-200° ; -180°] (respectively [+180° ; +200°]) longitude intervalle ?