I am not too much an expert in Resolve, but to make this simple. Try rendering out the title (with an alpha channel) and reimport and see if it now works. If so then you know it’s applying to the text tool output that is the issue and I am not sure how to help with that. There are types of flat text at certain speed that won’t do great with RSMB though and a simple small vertical blur works better, trying to first see if we get there.
I am not too much an expert in Resolve, but to make this simple. Try rendering out the title (with an alpha channel) and reimport and see if it now works. If so then you know it’s applying to the text tool output that is the issue and I am not sure how to help with that. There are types of flat text at certain speed that won’t do great with RSMB though and a simple small vertical blur works better, trying to first see if we get there.