Fwd: Change the auth. postgresql and GIS

Dear Community,

we tried to change the auth. in our postgresql environment (PostgreSQL V.11)
from MD5 to SCRUM SHA 256

- stop the services and killed all active connections
- changed with alter and set pw the editor user to sha (psql)
- checked if the pw changes successfull (psql and pg4admin)
- tried to open new document from GIS desktop and edit --> error msg.
connection not available
- after few minutes the pw synchonized and changed automatically back

My questions are:
Is it possible to work with GIS files (desktop and web) after pw changes to
SHA 256? We are handling with this issue and don't want to change it
directly for gisadmin (owner all db's) either with the postgres user

Does the changes revert back automatically to MD5 after a while due
synchronization? In our test environment tried the same way, although the
only difference was that we changed as well pg_hba_conf as well
host postgres all 172.xxx.xxx.83/32 scram-sha-256
and Type DB USER ADDRESS METHOD --> trust and
scram-sha-256 overall.

Many thanks in advance
Best Regards
Nikola Lubenov