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Customer relies on behaviour of zenity 3.22. Or better saying,
requests revert of 
  https://gitlab.gnome.org/GNOME/zenity/-/commit/3b64d05e8a1aae1581d2bec7288d80ac4699e1b1
[Fix message dialog width and height on recent Gtk]

  Customer is aware that "most" of the old behaviour can be get back
with the --no-wrap option, but they have a very large product, and
do not expect to need to review every usage of zenity.

  Please see https://en.wikipedia.org/wiki/Zenity and the Posix example.

  One extreme example is:

zenity --question  --text="`perl -e 'print \"abc \" x 512'`"

previously would not be great, as it would just create a full screen
window, but would correctly wrap the text. Now, in 3.28, it creates a
really tall window. The --no-wrap option does not help, as it will just
not wrap and create a very large window.

Our original example wasn't that extreme at all, just look at it:

zenity --title "" --error --text='Cannot launch another application instance since there is already a running one!'

With new zenity it wraps every word to a new line, old one showed the sentence in one line, not wrapped at all

@modehnal will you take look at this and grant qa_ack+?

Is the fix here already available on RHEL 9 (if so, after which RPM version)? Or there will also be a newer RPM for RHEL 9?

The fixed version in RHEL9 is zenity-3.32.0-8.el9

For completeness here is the RHEL 8 bug - https://bugzilla.redhat.com/show_bug.cgi?id=2053530 and RHEL 9 bug - https://bugzilla.redhat.com/show_bug.cgi?id=2078712

Thanks, I'll validate the fixes when I'm able (and when the RPMs are available).

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (zenity bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:5241