I didn’t try this although I’ve really wanted to give it a go. Can you use the URLencode component to URLencode the body, then put it into the custom action. Then use integromat to decode that body, before sending to sendgrid.
An idea I had a while back that I didn’t get round to testing.
Hi, seems you found a solution.
I had the same problem but now my multi-lined text body Email Alert via SendGrid is working.
Just created a ticket to Adalo team as it seemed more relate to server (timezone) issue.
In my case, I couldn’t send the same mult-line text Email at certain time (during my daytime at JST - perhaps same as yours) but the email is currently working as of almost midnight JST. Just FYI.