Solid hatch does not cover some elements even if it is pushed to top with Order

[dellus]

Expected behavior:

Solid hatch covers all elements below if it is pushed to top with Order.

Observed behavior:

Polylines, text and dimension line text stay visible.

Steps to reproduce or sample file:

Draw some elements including polylines, rectangles, dimension lines. Draw an extra rectangle covering large part of the other elements and fill it with a solid hatch of some colour. Push the solid to the uppermost position with the Order command.

Operating System and LibreCAD version info:

Version: 2.2.1_rc2-1-g4cd3b138 Appimage
Compiler: GNU GCC 11.4.0
Compiled on: May 13 2024
Qt Version: 5.15.3
Boost Version: 1.74.0
System: fossapup64 9.5

[dellus]

Sample file:
solidtest220.zip
An even more weird sample, an older file:
arch_cm_100_a4_uebung_220.zip
It shows right in normal view, but wrong in Print Preview. I couldn't reproduce this in a new drawing.
All samples behave well in LibreCAD 2.2.0. Not in 2.2.1.

[dxli]

What about hatches

[dxli]

For solid, we should allow setting of its alpha channel.

Or simply setting alpha=1, say, for printing.

[dellus]

Alpha channel for solids - what does this mean? I know in bitmap graphics it's about transparency. Would this help for this issue? It works all right in 2.2.0 without that feature.
But anyway I would appreciate to be able to set a transparency value for a solid. It's valuable for graphical effects, for example in an architectural facade drawing, laying a shade over an already coloured surface to give a three-dimensional impression.
This would make LibreCAD an interesting tool for graphic designers as it is a pain to draw with exact dimensions in usual graphic apps like inkscape. A new area for LibreCAD to expand into.

By the way, the new Entity Info tool does not react to a solid (normal hatch works), and the solid also prevents other entities beneath it to be detected.

[dxli]

It appears to me the trouble is limited to polylines.

Other primitive geometries are hidden by the solid fill, if sent to bottom