[Bug 50356] New: LOTRO store shows blank window in 6.0-rc2 (regression vs. stable)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50356

Bug ID: 50356
           Summary: LOTRO store shows blank window in 6.0-rc2 (regression
                    vs. stable)
           Product: Wine
           Version: 6.0-rc2
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 68954
  --> https://bugs.winehq.org/attachment.cgi?id=68954
empty LOTRO store Window on 6.0-rc2

When switching from the current winehq-stable (5.22) to winehq-devel (6.0-rc2)
on Linux Mint 20 (amd64) the LOTRO store no longer renders but shows a blank
window, rendering it unusable (see attached screenshot).

The only workaround is to run the legacy client, which delegates the store to
an external browser instead of showing it ingame, but that one lacks modern
graphics options and is prone to crashing due to lack of 64 bit support for
more addressable memory.