Impacted versions:
At least version 10, version 11(Can only re-produce the problem sometimes)

Steps to reproduce:
Please see this screencast recorded on odoo runbot.
https://youtu.be/cSPQvp9jQJc

Current behavior:
When users search by account in Journal Entries List View. A special value "dummy_account_id" is set in context, in order to facilitate search by account on account.move level.
With this context value , when users create a journal entries, the system will add default value before the creation.

https://github.com/odoo/odoo/blob/fc69b37cf710623ea215cd085e998679d8c50985/odoo/models.py#L3802

This method will set "dummy_account_id" to the previously searched account in vals.

Then the system continue creating account.move and related account.move.line records.
It is fine until the system run this:
https://github.com/odoo/odoo/blob/fc69b37cf710623ea215cd085e998679d8c50985/odoo/models.py#L3830

Since "dummy_account_id" is related field, and it now has value. The system will change the first related  account.move.line record to dummy_account_id.

Eventualy, the account is wrongly set to "dummy_account_id".

Expected behavior:
This is a feature which will fill the form field value with searched value for users. But the journal entry creation should not be affected by dummy_account_id, since it is only for searching purpose.

@Yenthe666 Would you please review this issue and help to bring related odoo staff to this issue?
addons/account/models/account_move.py
is_partner and 'partner_id, partner_name,' or ' ',
                is_partner and 'p.id AS partner_id, p.name AS partner_name,' or ' ',
                is_partner and 'RIGHT JOIN res_partner p ON (l.partner_id = p.id)' or ' ',
                is_partner and ' ' or "AND at.type <> 'payable' AND at.type <> 'receivable'",
                account_type and "AND at.type = %(account_type)s" or '',
                res_ids and 'AND ' + res_alias + '.id in %(res_ids)s' or '',
                self.env.user.company_id.id,
                is_partner and 'AND l.partner_id = p.id' or ' ',
                is_partner and 'l.partner_id, p.id,' or ' ',
                res_alias=res_alias
            ))
        self.env.cr.execute(query, locals())
        
        rows = self.env.cr.dictfetchall()
        ids = [x['account_id'] for x in rows]
        allowed_ids = set(self.env['account.account'].browse(ids).ids)
        rows = [row for row in rows if row['account_id'] in allowed_ids]
        if is_partner:
            ids = [x['partner_id'] for x in rows]
            allowed_ids = set(self.env['res.partner'].browse(ids).ids)
            rows = [row for row in rows if row['partner_id'] in allowed_ids]
        
        for row in rows:
            account = self.env['account.account'].browse(row['account_id'])
            row['currency_id'] = account.currency_id.id or account.company_id.currency_id.id
            partner_id = is_partner and row['partner_id'] or None
            row['reconciliation_proposition'] = self.get_reconciliation_proposition(account.id, partner_id)
        return rows
    @api.model
    def get_reconciliation_proposition(self, account_id, partner_id=False):