Not launching explicitly in interactive shell

[HankAviator]

In addition to the details for issue, please provide us Executables information and Debug output unless you have confidence that they don't help us.

Executables

Version of bash-debug: (can be checked in: ctrl+shift+X or command+shift+X -> INSTALLED: Bash Debug)
v0.3.9
Output of following commands (on windows, execute them in Command Prompt or PowerShell):

bash -c 'uname -a; for P in bash bashdb cat mkfifo pkill; do echo ---; which -a $P; command $P --version; done'
Linux catnip 5.10.60.1-microsoft-standard-WSL2 #1 SMP Wed Aug 25 23:20:18 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
---
/usr/bin/bash
/bin/bash
GNU bash, version 5.0.17(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
---
bash: bashdb: command not found
---
/usr/bin/cat
/bin/cat
cat (GNU coreutils) 8.30
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Torbjorn Granlund and Richard M. Stallman.
---
/usr/bin/mkfifo
/bin/mkfifo
mkfifo (GNU coreutils) 8.30
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by David MacKenzie.
---
/usr/bin/pkill
/bin/pkill
pkill from procps-ng 3.3.16

Debug output

{
	// Use IntelliSense to learn about possible attributes.
	// Hover to view descriptions of existing attributes.
	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
	"version": "0.2.0",
	"configurations": [
		{
			"type": "bashdb",
			"request": "launch",
			"name": "Bash-Debug (simplest configuration)",
			"program": "${file}",
			"cwd": "${fileDirname}",
			"terminalKind": "integrated",
			"trace": true

		}
	]
}

Details

Despite shebang was written as #!/bin/bash -i, the shell was not spawned interactively. My wsl has no access to Google and I need to debug some OAuth 2.0 API via proxy, which is assigned in ~/.profile as http_proxy. Currently the only way is to add source ~/.profile into the script to read the proxy variable.