确实可以复现。。。
$ tiup playground --host 192.168.195.128 --tiflash 0 --tag ylsoft
tiup is checking updates for component playground ...
Starting component `playground`: /home/shawnyan/.tiup/components/playground/v1.12.3/tiup-playground --host 192.168.195.128 --tiflash 0 --tag ylsoft
Using the version v7.2.0 for version constraint "".
If you'd like to use a TiDB version other than v7.2.0, cancel and retry with the following arguments:
Specify version manually: tiup playground <version>
Specify version range: tiup playground ^5
The nightly version: tiup playground nightly
Start pd instance:v7.2.0
Start tikv instance:v7.2.0
Start tidb instance:v7.2.0
Waiting for tidb instances ready
192.168.195.128:4000 ... Done
🎉 TiDB Playground Cluster is started, enjoy!
...
mysql> select version();
+--------------------+
| version() |
+--------------------+
| 5.7.25-TiDB-v7.2.0 |
+--------------------+
1 row in set (0.00 sec)
mysql> alter user root@'%' identified by 'ylsoft';
Query OK, 0 rows affected (0.11 sec)
mysql> select user,host,authentication_string from mysql.user;
+------+------+-------------------------------------------+
| user | host | authentication_string |
+------+------+-------------------------------------------+
| root | % | *343D863064865188992E8D2BEA644AC54835E7ED |
+------+------+-------------------------------------------+
1 row in set (0.00 sec)