bug#49959: 28.0.50; Emacs got quasi freeze

[martin rudalics <rudalics@gmx.at>]

 > Sorry, the enlightenment's developper said,that there exists a bug in
 > the git head as follows;
 >
 > In the Message;
 >
 >    Subject    : Re: [e-users] emacs problem persists
 >    Message-ID : <20210821072303.ead4637113305e2e518936b8@rasterman.com>
 >    Date & Time: Sat, 21 Aug 2021 07:23:03 +0100
 >
 > [Dev] == Dev <xxxx@xxxx.com> has written:
 >
 > CH>  This is not a fix. it is a test. You have an emacs bug. It
 > CH>  doesn't handle the hidden state changes properly and chooses to
 > CH>  not render updates. :) But you can now tell them what the bug is.

Could you please ask the developer what the bug really is?  Which are
the hidden changes and in which sense do we not render updates?  What
should we do better?

Thank you for any enlightenment in this area, martin