Prestahop api 1.7 update order webservice error - api

Question

I'm triyng to update an order status & tranking number on prestashop 1.7.6.0 via webservice but if the new order status has to send email to customer I get error 500.
Cases:
new order status id 5 send email > error 500 (status changed, no mail sent, other changes like track nr ignored)
new order status id 4 doesn't send email > code 200 (all ok)
BUT if I try changing manually in back office to order status id 5 all is working, status changed and mail sent.
I do all my test on Postman as these information will be changed with a call from an external service for the management of shipment, how can I debug this problem?
End Point: www.domain.ext/api/orders/10705
xml sent
<?xml version="1.0" encoding="UTF-8"?>
<prestashop xmlns:xlink="http://www.w3.org/1999/xlink">
<order>
<id>10705</id>
<id_address_delivery xlink:href="https://www.domain.ext/api/addresses/11307">11307</id_address_delivery>
<id_address_invoice xlink:href="https://www.domain.ext/api/addresses/11307">11307</id_address_invoice>
<id_cart xlink:href="https://www.domain.ext/api/carts/11918">11918</id_cart>
<id_currency xlink:href="https://www.domain.ext/api/currencies/2">2</id_currency>
<id_lang xlink:href="https://www.domain.ext/api/languages/2">2</id_lang>
<id_customer xlink:href="https://www.domain.ext/api/customers/10806">10806</id_customer>
<id_carrier xlink:href="https://www.domain.ext/api/carriers/5">5</id_carrier>
<current_state xlink:href="https://www.domain.ext/api/order_states/5">5</current_state>
<module>codwfeeplus</module>
<invoice_number>0</invoice_number>
<invoice_date>2022-05-10 15:32:41</invoice_date>
<delivery_number>9050</delivery_number>
<delivery_date>2022-05-17 15:16:33</delivery_date>
<valid>1</valid>
<date_add>2022-05-10 15:32:40</date_add>
<date_upd>2022-05-17 15:23:53</date_upd>
<shipping_number notFilterable="true">1592222222</shipping_number>
<id_shop_group>1</id_shop_group>
<id_shop>1</id_shop>
<secure_key>044248612d0019be079f165138d46e85</secure_key>
<payment>CONTRASSEGNO</payment>
<recyclable>0</recyclable>
<gift>0</gift>
<gift_message/>
<mobile_theme>0</mobile_theme>
<total_discounts>0.000000</total_discounts>
<total_discounts_tax_incl>0.000000</total_discounts_tax_incl>
<total_discounts_tax_excl>0.000000</total_discounts_tax_excl>
<total_paid>15.500000</total_paid>
<total_paid_tax_incl>15.500000</total_paid_tax_incl>
<total_paid_tax_excl>15.500000</total_paid_tax_excl>
<total_paid_real>15.500000</total_paid_real>
<total_products>9.500000</total_products>
<total_products_wt>9.500000</total_products_wt>
<total_shipping>6.000000</total_shipping>
<total_shipping_tax_incl>6.000000</total_shipping_tax_incl>
<total_shipping_tax_excl>6.000000</total_shipping_tax_excl>
<carrier_tax_rate>0.000</carrier_tax_rate>
<total_wrapping>0.000000</total_wrapping>
<total_wrapping_tax_incl>0.000000</total_wrapping_tax_incl>
<total_wrapping_tax_excl>0.000000</total_wrapping_tax_excl>
<round_mode>2</round_mode>
<round_type>1</round_type>
<conversion_rate>1.000000</conversion_rate>
<reference>10705</reference>
<associations>
<order_rows nodeType="order_row" virtualEntity="true">
<order_row>
<id>10913</id>
<product_id xlink:href="https://www.domain.ext/api/products/203975">203975</product_id>
<product_attribute_id>0</product_attribute_id>
<product_quantity>1</product_quantity>
<product_name>xxxxxxxxxxxxxxxxxxxx</product_name>
<product_reference>12859</product_reference>
<product_ean13/>
<product_isbn/>
<product_upc/>
<product_price>10.000000</product_price>
<id_customization xlink:href="https://www.domain.ext/api/customizations/0">0</id_customization>
<unit_price_tax_incl>9.500000</unit_price_tax_incl>
<unit_price_tax_excl>9.500000</unit_price_tax_excl>
</order_row>
</order_rows>
</associations>
</order>
</prestashop>

Answer 1

I found it's a Prestashop 1.7.6 WS bug
https://github.com/PrestaShop/PrestaShop/issues/14842
Solved here https://github.com/PrestaShop/PrestaShop/pull/14899