SMS sending entering in loop

[muulox]

Hello,
I’ve been experiencing a very strange issue for 5 days with sending SMS messages through RDS-RCS. I don’t know where the problem could be coming from—possibly from an update (I updated EspoCRM and all modules) or something else. I should mention that I haven’t modified the SMS code.
WHAT I TRIED:

1. I disabled the cron job.
2. I disabled all workflows.
3. I performed a restore from 4 days ago when everything was working perfectly on the entire VM.
4. I asked RDS-RCS if they had modified the API, but their answer was negative—they didn’t change anything.

What I observed:
When an SMS is sent for 2FA authentication, it sends only one SMS. But when I try to send an SMS from a workflow, it sends n SMS messages —continuously—until RDS-RCS cuts off the sending after 20 messages, because it goes into a loop.

Simple buton sms sending, I integrated a simple code to check if the variables were to blame, but even with this code, the SMS is sent in a loop to a single phone number.

$body = 'test sms2';
$phoneNumber = '+40747995968';

$smsId = record\create(
    'Sms',
    'to', $phoneNumber,
    'body', $body
);

ext\sms\send($smsId);​ 

After i press the send sms button i recive an error500, and in the log dosent recive any specific error for the error 500, only the sms was sent 20 times, this log x20.
See the log:

	Error		"{"jsonrpc":"2.0","id":1,"result":{"messageId" :"10 42a79566f","operator":"Orange","errorCode":0,"erro rMessage":""}}\n"	Astăzi 18:59
	Error		"HTTP/1.1 200 \r\nX-Content-Type-Options: nosniff\r\nX-XSS-Protection: 1; mode=block\r\nCache-Control: no-cache, no-store, max-age=0, must-revalidate\r\nPragma: no-cache\r\nExpires: 0\r\nStrict-Transport-Security: max-age=31536000 ; includeSubDomains\r\nX-Frame-Options: DENY\r\nContent-Type: application/json-rpc\r\nContent-Length: 114\r\nDate: Tue, 08 Jul 2025 15:59:42 GMT\r\n\r\n{"jsonrpc":"2.0","id":1,"result":{"mess ageId":"1042a79566f","operator":"Orange","errorCod e":0,"errorMessage":""}}\n"

What could be the cause of the SMS sending process entering a loop?
I also have other workflow buttons, such as sending emails or generating PDFs, but none of them go into a loop—only the SMS sending does.

Thank you!

[muulox]

debug error log:

E_DEPRECATED: Espo\Modules\Voip\Bases\Base::__construct(): Implicitly marking parameter $container as nullable is deprecated, the explicit nullable type must be used instead Astăzi 19:33 Notice E_DEPRECATED: Espo\Modules\Voip\Tools\PhoneNumber\Formatter\Util::parse(): Implicitly marking parameter $phoneNumber as nullable is deprecated, the explicit nullable type must be used instead Astăzi 19:33 Notice E_DEPRECATED: Espo\Modules\Voip\Bases\IManager::sendMessage(): Implicitly marking parameter $options as nullable is deprecated, the explicit nullable type must be used instead Astăzi 19:33 Notice E_DEPRECATED: Espo\Modules\Voip\Bases\IManager::handleMessage(): Implicitly marking parameter $messageData as nullable is deprecated, the explicit nullable type must be used instead Astăzi 19:33 Notice E_DEPRECATED: Espo\Modules\Voip\Bases\IManager::handleEvent(): Implicitly marking parameter $eventData as nullable is deprecated, the explicit nullable type must be used instead Astăzi 19:33 Notice E_DEPRECATED: Espo\Modules\Voip\Bases\Manager::handleMessage(): Implicitly marking parameter $messageData as nullable is deprecated, the explicit nullable type must be used instead Astăzi 19:33 Notice E_DEPRECATED: Espo\Modules\Voip\Bases\Manager::handleEvent(): Implicitly marking parameter $eventData as nullable is deprecated, the explicit nullable type must be used instead Astăzi 19:33 Notice E_DEPRECATED: Espo\Modules\Voip\Bases\Manager::sendMessage(): Implicitly marking parameter $options as nullable is deprecated, the explicit nullable type must be used instead   Error   "{"jsonrpc":"2.0","id":1,"result":{"messageId":"1041cfbc142","operator":"Orange","errorCode":0,"errorMessage":""}}\n" Astăzi 19:33   Error   "HTTP/1.1 200 \r\nX-Content-Type-Options: nosniff\r\nX-XSS-Protection: 1; mode=block\r\nCache-Control: no-cache, no-store, max-age=0, must-revalidate\r\nPragma: no-cache\r\nExpires: 0\r\nStrict-Transport-Security: max-age=31536000 ; includeSubDomains\r\nX-Frame-Options: DENY\r\nContent-Type: application/json-rpc\r\nContent-Length: 114\r\nDate: Tue, 08 Jul 2025 16:33:22 GMT\r\n\r\n{"jsonrpc":"2.0","id":1,"result":{"messageId":"1041cfbc142","operator":"Orange","errorCode":0,"errorMessage":""}}\n" Astăzi 19:33   Debug   Workflow 68666c6907e9f0f10, executeFormula, Start, cid 0, CInterventie 6787976a5d3bea8d0 Astăzi 19:33   Debug   Workflow 68666c6907e9f0f10: Start actions. Astăzi 19:33 

[muulox]

Update: I switched the SMS provider to SMS77, but the SMS sending still enters a loop. I believe it's either an issue with the EspoCRM core or something related to our server.
We are using cPanel.

Versiune PHP	8.4.8	Success
json	On	Success
openssl	On	Success
mbstring	On	Success
zip	On	Success
gd	On	Success
iconv	On	Success
curl	On	Success
xml	On	Success
xmlwriter	On	Success
exif	On	Success
pdo_mysql	On	Success
max_execution_time	3600	Success
max_input_time	3600	Success
memory_limit	4000M	Success
post_max_size	1280M	Success
upload_max_filesize	256M	Success

MariaDB version	10.11.13	Success
Numele Gazdei	localhost	Success
Numele Bazei de Date	erpmuuloxcom_espo35	Success
Nume Utilizator	erpmuuloxcom_espo35	Success

/home/erpmuuloxcom/public_html/data	Writable	Success
/home/erpmuuloxcom/public_html/client/custom	Writable	Success
/home/erpmuuloxcom/public_html/custom/Espo/Custom	Writable	Success
/home/erpmuuloxcom/public_html/custom/Espo/Modules	Writable	Success