Strange behavior after removing folder

[Батунин Сергей]

   Configuration Information
   Machine: x86_64
   OS: linux-gnu
   Compiler: gcc
   Compilation CFLAGS: -g -O2
   -fdebug-prefix-map=/build/bash-Smvct5/bash-5.0=.
   -fstack-protector-strong -Wformat ->
   uname output: Linux bab-VirtualBox 5.15.0-87-generic #97~20.04.1-Ubuntu
   SMP Thu Oct 5 08:25:28 UTC 2023 x86_64 >
   Machine Type: x86_64-pc-linux-gnu

   Bash Version: 5.0
   Patch Level: 17
   Release Status: release

   Description:
   I entered  the following commands:
           cd
          mkdir a
          cd a
          rmdir $PWD
           cd .
   Then my $PWD  became /a/./
   Also, i entered
           cd ./////.
   Now my $PWD is ~/a/././////.
   Then I pressed ctrl+shift+t , and now in new window my $PWD=/
   Is it correct behavior?