Change in behaviour V9 ./. V10 intended?

[Klaus Ramstöck - ECOS Technology]

V10 brings a change that is slightly annoying to me, I think it is related to this fix mentioned in the change log
https://bugzilla.mindrot.org/show_bug.cgi?id=3477

Here is an example of the change in behaviour:

#
# Older system, using openssh portable V9:
# ssh -V
OpenSSH_9.8p1, OpenSSL 3.0.15 3 Sep 2024

# ssh user%1234567890 at 127.0.0.1
(user%1234567890 at 127.0.0.1) Password: 

# no expansion, %% is passed as is
# ssh user%%1234567890 at 127.0.0.1
(user%%1234567890 at 127.0.0.1) Password: 


#
# Current system, using V10:
# ssh -V
OpenSSH_10.0p2, OpenSSL 3.5.0 8 Apr 2025
# ssh user%1234567890 at 127.0.0.1

vdollar_percent_expand: unknown key %1
percent_dollar_expand: failed

# % must be escaped as %%
# ssh user%%1234567890 at 127.0.0.1 
(user%1234567890 at 127.0.0.1) Password: 

User names follow a <user>%<id> pattern.

Is this the intended behaviour? The section form the release notes

ssh(1): allow %-token and environment variable expansion in
   the ssh_config User directive, with the exception of %r and %C
   which would be self-referential. bz#3477

suggests only the User directive should be affected.

Thanks 
Klaus Ramstöck
Entwickler