openmsx debugger - memory layout

A lot of things, I just noticed it suddenly.
However... the "debugger hex view: 4mb external ram regs" does display the segments (*), so I was wondering why the memory layout view does not.

(*) it displays 5 items ????

The debugger (development build from github) shows this:

Now when I implement this tcl script:

proc debug_memmapper { } {
  set result ""
  for { set page 0 } { $page < 4 } { incr page } {
    set tmp [get_selected_slot $page]
    append result [lindex $tmp 0] "-" [lindex $tmp 1]
    if { [lsearch [debug list] "MapperIO"] != -1} {
      append result " segment " [debug read "MapperIO" $page]
    } else {
      append result "?"
    }
	append result "\n"
  } 
  return $result
}

And run "debug_memmapper" in the console I do get results:

The machine has a MFRSD+ and the default Turbo-R GT memory mappers configured.

set auto_enable_reverse off
machine "Panasonic_FS-A1GT2_int"
set power off
ext "MegaFlashROM_SCC+_SD"
ext "moonsound"
ext "video9000"
hda insert N:/app/MSX/Disk/SUNRISE_IDE_A.dsk
hdb insert N:/app/MSX/Disk/SD.dsk

debug set_watchpoint write_io 0x2D
debug set_watchpoint write_io 0x00 {} {set throttle $::wp_last_value}

set scale_algorithm simple
set scanline 15
set blur 0
plug joyporta mouse
set too_fast_vram_access real
set VDP.too_fast_vram_access_callback debug_too_fast_vram_access
set power on
set fullspeedwhenloading on
set throttle off
after time 30 "set throttle on"

I used this build:

Well I don't know what build worked, but none of these do:
openMSX_Debugger_x64_20180220.zip
openMSX_Debugger_x64_20201008.zip

I don't have any older ones. The blendsplitter one does not work either.

Maybe it is some setting in OpenMSX itself?

If you want to check whether it's an openMSX setting, you could rename settings.XML to reset them to defaults.