Random stopped executions

Hello,
We have Pro N8N Cloud plan. Now we run 10 execution, but this stopped in same time. This is not the first time, but for example this stopped today 2-3 times random, but all execution in same time. In these cases, the error handling workflow will not receive a signal either. Could this be a N8N Cloud server error? What can I do?
I run n8n 1.83.2 version.
Thanks!

check the log to figure out the issue

In execution history write only ERROR, but all nodes are green. And don’t trigger my error handler workflow with error trigger.

You mean you run ten different workflow at the same time and some of them stop at the same time?

yes, all running workflow stop in same time. And now in last time (1-2h ago), I was creating a new workflow and I saw "connection lost "text in save button place. Then I checked the executions and they all stopped

What kind of workflow did you run ? Maybe it’s because it takes too much resources and up to the limit of your account.

I run workflows with google sheets, imap, smtp nodes. But each workflows sent max 4 email / min.

Then you should contact the n8n admin.

Yes, I wrote to them yesterday, but no reply yet. Thanks for trying to help!

I know this is an old thread, however I had a similar issue on my self-hosted n8n. Even though my n8n instance had 64GB of memory available, the workflow would do a soft kill after a specified some time. Turns out, this issue is related to Heap out of Memory and can be corrected by setting - NODE_OPTIONS=–max_old_space_size=61440 in environment variable. By default only 4GB of memory is assigned to Javascript V8 engine as cache memory. This increases it to max ram available in your system (change the 61440 which is in MB to the max RAM you have on your PC). This should prevent softkills.